66490655094864 has 240 divisors, whose sum is σ = 249843674231424. Its totient is φ = 15941815372800.

The previous prime is 66490655094859. The next prime is 66490655094907. The reversal of 66490655094864 is 46849055609466.

66490655094864 is a `hidden beast` number, since 6 + 6 + 4 + 9 + 0 + 6 + 550 + 9 + 4 + 8 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 66490655094792 and 66490655094801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 230495547 + ... + 230783834.

Almost surely, 2^{66490655094864} is an apocalyptic number.

It is an amenable number.

66490655094864 is an abundant number, since it is smaller than the sum of its proper divisors (183353019136560).

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

66490655094864 is a wasteful number, since it uses less digits than its factorization.

66490655094864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461279426 (or 461279417 counting only the distinct ones).

The product of its (nonzero) digits is 1343692800, while the sum is 72.

The spelling of 66490655094864 in words is "sixty-six trillion, four hundred ninety billion, six hundred fifty-five million, ninety-four thousand, eight hundred sixty-four".