616761660757 has 4 divisors (see below), whose sum is σ = 672830902656. Its totient is φ = 560692418860.

The previous prime is 616761660721. The next prime is 616761660773. The reversal of 616761660757 is 757066167616.

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 a de Polignac number, because none of the positive numbers 2^k-616761660757 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616761630757) 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, 28034620933 + ... + 28034620954.

It is an arithmetic number, because the mean of its divisors is an integer number (168207725664).

Almost surely, 2^616761660757 is an apocalyptic number.

It is an amenable number.

616761660757 is a deficient number, since it is larger than the sum of its proper divisors (56069241899).

616761660757 is a wasteful number, since it uses less digits than its factorization.

616761660757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56069241898.

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 616761660757 in words is "six hundred sixteen billion, seven hundred sixty-one million, six hundred sixty thousand, seven hundred fifty-seven".