664621542362214 has 80 divisors (see below), whose sum is σ = 1511814608637696. Its totient is φ = 218189577236400.

The previous prime is 664621542362153. The next prime is 664621542362237. The reversal of 664621542362214 is 412263245126466.

664621542362214 is a `hidden beast` number, since 6 + 6 + 4 + 6 + 2 + 1 + 5 + 4 + 2 + 3 + 622 + 1 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19616122 + ... + 41400909.

Almost surely, 2^{664621542362214} is an apocalyptic number.

664621542362214 is an abundant number, since it is smaller than the sum of its proper divisors (847193066275482).

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

664621542362214 is a wasteful number, since it uses less digits than its factorization.

664621542362214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61018063 (or 61018054 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 54.

The spelling of 664621542362214 in words is "six hundred sixty-four trillion, six hundred twenty-one billion, five hundred forty-two million, three hundred sixty-two thousand, two hundred fourteen".