6664751145 has 128 divisors (see below), whose sum is σ = 13978137600. Its totient is φ = 2981228544.

The previous prime is 6664751143. The next prime is 6664751161. The reversal of 6664751145 is 5411574666.

6664751145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6664751145 - 2¹ = 6664751143 is a prime.

It is a super-2 number, since 2×6664751145² = 88837815649557622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6664751145.

It is not an unprimeable number, because it can be changed into a prime (6664751141) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 861364 + ... + 869066.

It is an arithmetic number, because the mean of its divisors is an integer number (109204200).

Almost surely, 2^6664751145 is an apocalyptic number.

6664751145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6664751145 is an abundant number, since it is smaller than the sum of its proper divisors (7313386455).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6664751145 is a wasteful number, since it uses less digits than its factorization.

6664751145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776 (or 7770 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 6664751145 is about 81637.9271233659. The cubic root of 6664751145 is about 1881.8917830047.

The spelling of 6664751145 in words is "six billion, six hundred sixty-four million, seven hundred fifty-one thousand, one hundred forty-five".