61660860776 has 16 divisors (see below), whose sum is σ = 118073989440. Its totient is φ = 30174463600.

The previous prime is 61660860773. The next prime is 61660860809. The reversal of 61660860776 is 67706806616.

It is not an unprimeable number, because it can be changed into a prime (61660860773) 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, 81995450 + ... + 81996201.

It is an arithmetic number, because the mean of its divisors is an integer number (7379624340).

Almost surely, 2^61660860776 is an apocalyptic number.

It is an amenable number.

61660860776 is a deficient number, since it is larger than the sum of its proper divisors (56413128664).

61660860776 is a wasteful number, since it uses less digits than its factorization.

61660860776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163991704 (or 163991700 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 61660860776 in words is "sixty-one billion, six hundred sixty million, eight hundred sixty thousand, seven hundred seventy-six".