65616427790 has 32 divisors (see below), whose sum is σ = 125896550400. Its totient is φ = 24536856064.

The previous prime is 65616427787. The next prime is 65616427879. The reversal of 65616427790 is 9772461656.

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 15 ways as a sum of consecutive naturals, for example, 1269902 + ... + 1320561.

It is an arithmetic number, because the mean of its divisors is an integer number (3934267200).

Almost surely, 2^65616427790 is an apocalyptic number.

65616427790 is a deficient number, since it is larger than the sum of its proper divisors (60280122610).

65616427790 is a wasteful number, since it uses less digits than its factorization.

65616427790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590636.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 65616427790 in words is "sixty-five billion, six hundred sixteen million, four hundred twenty-seven thousand, seven hundred ninety".