66411865861532 has 12 divisors (see below), whose sum is σ = 123057280861200. Its totient is φ = 31252642758336.

The previous prime is 66411865861519. The next prime is 66411865861567. The reversal of 66411865861532 is 23516856811466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488322543032 + ... + 488322543167.

It is an arithmetic number, because the mean of its divisors is an integer number (10254773405100).

Almost surely, 2^{66411865861532} is an apocalyptic number.

It is an amenable number.

66411865861532 is a deficient number, since it is larger than the sum of its proper divisors (56645414999668).

66411865861532 is a wasteful number, since it uses less digits than its factorization.

66411865861532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976645086220 (or 976645086218 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 62.

The spelling of 66411865861532 in words is "sixty-six trillion, four hundred eleven billion, eight hundred sixty-five million, eight hundred sixty-one thousand, five hundred thirty-two".