6609157656 has 32 divisors (see below), whose sum is σ = 16632326400. Its totient is φ = 2188461600.

The previous prime is 6609157613. The next prime is 6609157661. The reversal of 6609157656 is 6567519066.

It is a junction number, because it is equal to n+sod(n) for n = 6609157599 and 6609157608.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 908236 + ... + 915483.

It is an arithmetic number, because the mean of its divisors is an integer number (519760200).

Almost surely, 2^6609157656 is an apocalyptic number.

It is an amenable number.

6609157656 is an abundant number, since it is smaller than the sum of its proper divisors (10023168744).

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

6609157656 is a wasteful number, since it uses less digits than its factorization.

6609157656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823879 (or 1823875 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 51.

The square root of 6609157656 is about 81296.7259857370. The cubic root of 6609157656 is about 1876.6446162737.

The spelling of 6609157656 in words is "six billion, six hundred nine million, one hundred fifty-seven thousand, six hundred fifty-six".