6667351445 has 4 divisors (see below), whose sum is σ = 8000821740. Its totient is φ = 5333881152.

The previous prime is 6667351441. The next prime is 6667351447. The reversal of 6667351445 is 5441537666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4274282884 + 2393068561 = 65378^2 + 48919^2 .

It is a cyclic number.

It is not a de Polignac number, because 6667351445 - 2² = 6667351441 is a prime.

It is a super-2 number, since 2×6667351445² = 88907150582287176050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6667351445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667351441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666735140 + ... + 666735149.

It is an arithmetic number, because the mean of its divisors is an integer number (2000205435).

Almost surely, 2^6667351445 is an apocalyptic number.

It is an amenable number.

6667351445 is a deficient number, since it is larger than the sum of its proper divisors (1333470295).

6667351445 is a wasteful number, since it uses less digits than its factorization.

6667351445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333470294.

The product of its digits is 1814400, while the sum is 47.

The square root of 6667351445 is about 81653.8513788541. The cubic root of 6667351445 is about 1882.1364956642.

The spelling of 6667351445 in words is "six billion, six hundred sixty-seven million, three hundred fifty-one thousand, four hundred forty-five".