51666010614931 has 4 divisors (see below), whose sum is σ = 51671040905664. Its totient is φ = 51660980324200.

The previous prime is 51666010614877. The next prime is 51666010614947. The reversal of 51666010614931 is 13941601066615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51666010614931 - 2³⁹ = 51116254801043 is a prime.

It is a super-2 number, since 2×51666010614931² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51666010617931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2515129960 + ... + 2515150501.

It is an arithmetic number, because the mean of its divisors is an integer number (12917760226416).

Almost surely, 2^{51666010614931} is an apocalyptic number.

51666010614931 is a deficient number, since it is larger than the sum of its proper divisors (5030290733).

51666010614931 is a wasteful number, since it uses less digits than its factorization.

51666010614931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030290732.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 51666010614931 in words is "fifty-one trillion, six hundred sixty-six billion, ten million, six hundred fourteen thousand, nine hundred thirty-one".