65987877474 has 40 divisors (see below), whose sum is σ = 148081675500. Its totient is φ = 21963239424.

The previous prime is 65987877457. The next prime is 65987877499. The reversal of 65987877474 is 47477878956.

65987877474 is a `hidden beast` number, since 6 + 5 + 9 + 87 + 8 + 77 + 474 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62929234449 + 3058643025 = 250857^2 + 55305^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 193599 + ... + 411650.

Almost surely, 2^65987877474 is an apocalyptic number.

65987877474 is an abundant number, since it is smaller than the sum of its proper divisors (82093798026).

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

65987877474 is a wasteful number, since it uses less digits than its factorization.

65987877474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605936 (or 605927 counting only the distinct ones).

The product of its digits is 663828480, while the sum is 72.

The spelling of 65987877474 in words is "sixty-five billion, nine hundred eighty-seven million, eight hundred seventy-seven thousand, four hundred seventy-four".