66623714355175 has 12 divisors (see below), whose sum is σ = 83263905062656. Its totient is φ = 52879294540800.

The previous prime is 66623714355173. The next prime is 66623714355179. The reversal of 66623714355175 is 57155341732666.

It is not a de Polignac number, because 66623714355175 - 2¹ = 66623714355173 is a prime.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66623714355173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10491920346 + ... + 10491926695.

Almost surely, 2^{66623714355175} is an apocalyptic number.

66623714355175 is a deficient number, since it is larger than the sum of its proper divisors (16640190707481).

66623714355175 is a wasteful number, since it uses less digits than its factorization.

66623714355175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20983847178 (or 20983847173 counting only the distinct ones).

The product of its digits is 95256000, while the sum is 61.

The spelling of 66623714355175 in words is "sixty-six trillion, six hundred twenty-three billion, seven hundred fourteen million, three hundred fifty-five thousand, one hundred seventy-five".