616656057 has 4 divisors (see below), whose sum is σ = 822208080. Its totient is φ = 411104036.

The previous prime is 616656049. The next prime is 616656083. The reversal of 616656057 is 750656616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 616656057 - 2³ = 616656049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616756057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102776007 + ... + 102776012.

It is an arithmetic number, because the mean of its divisors is an integer number (205552020).

Almost surely, 2^616656057 is an apocalyptic number.

It is an amenable number.

616656057 is a deficient number, since it is larger than the sum of its proper divisors (205552023).

616656057 is a wasteful number, since it uses less digits than its factorization.

616656057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205552022.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 616656057 is about 24832.5604197392. The cubic root of 616656057 is about 851.1661304593.

The spelling of 616656057 in words is "six hundred sixteen million, six hundred fifty-six thousand, fifty-seven".