6647137830 has 40 divisors (see below), whose sum is σ = 17873417232. Its totient is φ = 1772569872.

The previous prime is 6647137759. The next prime is 6647137837. The reversal of 6647137830 is 387317466.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647137837) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4102362 + ... + 4103981.

Almost surely, 2^6647137830 is an apocalyptic number.

6647137830 is an abundant number, since it is smaller than the sum of its proper divisors (11226279402).

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

6647137830 is a wasteful number, since it uses less digits than its factorization.

6647137830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8206362 (or 8206353 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 6647137830 is about 81529.9811725723. The cubic root of 6647137830 is about 1880.2325265053.

The spelling of 6647137830 in words is "six billion, six hundred forty-seven million, one hundred thirty-seven thousand, eight hundred thirty".