6642225645 has 64 divisors (see below), whose sum is σ = 11927236608. Its totient is φ = 3129120000.

The previous prime is 6642225643. The next prime is 6642225647. The reversal of 6642225645 is 5465222466.

It is an interprime number because it is at equal distance from previous prime (6642225643) and next prime (6642225647).

It is not a de Polignac number, because 6642225645 - 2¹ = 6642225643 is a prime.

It is a super-3 number, since 3×6642225645³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6642225597 and 6642225606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642225643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 831420 + ... + 839370.

It is an arithmetic number, because the mean of its divisors is an integer number (186363072).

Almost surely, 2^6642225645 is an apocalyptic number.

It is an amenable number.

6642225645 is a deficient number, since it is larger than the sum of its proper divisors (5285010963).

6642225645 is a wasteful number, since it uses less digits than its factorization.

6642225645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114.

The product of its digits is 691200, while the sum is 42.

The square root of 6642225645 is about 81499.8505826851. The cubic root of 6642225645 is about 1879.7692531232.

The spelling of 6642225645 in words is "six billion, six hundred forty-two million, two hundred twenty-five thousand, six hundred forty-five".