51666707571201 has 12 divisors (see below), whose sum is σ = 74630003398912. Its totient is φ = 34444326474936.

The previous prime is 51666707571181. The next prime is 51666707571229. The reversal of 51666707571201 is 10217570766615.

It is not a de Polignac number, because 51666707571201 - 2⁶ = 51666707571137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51666707551201) 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, 9827761 + ... + 14139246.

Almost surely, 2^{51666707571201} is an apocalyptic number.

It is an amenable number.

51666707571201 is a deficient number, since it is larger than the sum of its proper divisors (22963295827711).

51666707571201 is a wasteful number, since it uses less digits than its factorization.

51666707571201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24206540 (or 24206537 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 54.

The spelling of 51666707571201 in words is "fifty-one trillion, six hundred sixty-six billion, seven hundred seven million, five hundred seventy-one thousand, two hundred one".