66975840551457 has 32 divisors (see below), whose sum is σ = 99988895784960. Its totient is φ = 44307405282960.

The previous prime is 66975840551369. The next prime is 66975840551471. The reversal of 66975840551457 is 75415504857966.

66975840551457 is a `hidden beast` number, since 6 + 6 + 9 + 7 + 58 + 4 + 0 + 5 + 514 + 57 = 666.

It is not a de Polignac number, because 66975840551457 - 2⁷ = 66975840551329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66975840551057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16011243 + ... + 19756304.

It is an arithmetic number, because the mean of its divisors is an integer number (3124652993280).

Almost surely, 2^{66975840551457} is an apocalyptic number.

It is an amenable number.

66975840551457 is a deficient number, since it is larger than the sum of its proper divisors (33013055233503).

66975840551457 is a wasteful number, since it uses less digits than its factorization.

66975840551457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35768090 (or 35768084 counting only the distinct ones).

The product of its (nonzero) digits is 1270080000, while the sum is 72.

The spelling of 66975840551457 in words is "sixty-six trillion, nine hundred seventy-five billion, eight hundred forty million, five hundred fifty-one thousand, four hundred fifty-seven".