51257166066 has 64 divisors (see below), whose sum is σ = 114705561600. Its totient is φ = 16965936000.

The previous prime is 51257166061. The next prime is 51257166083. The reversal of 51257166066 is 66066175215.

51257166066 is a `hidden beast` number, since 5 + 1 + 25 + 7 + 16 + 606 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51257166061) 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, 6194580 + ... + 6202848.

It is an arithmetic number, because the mean of its divisors is an integer number (1792274400).

Almost surely, 2^51257166066 is an apocalyptic number.

51257166066 is an abundant number, since it is smaller than the sum of its proper divisors (63448395534).

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

51257166066 is a wasteful number, since it uses less digits than its factorization.

51257166066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9072 (or 9066 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 51257166066 in words is "fifty-one billion, two hundred fifty-seven million, one hundred sixty-six thousand, sixty-six".