51702006666 has 32 divisors (see below), whose sum is σ = 105394681728. Its totient is φ = 16905369600.

The previous prime is 51702006661. The next prime is 51702006679. The reversal of 51702006666 is 66660020715.

It is a super-2 number, since 2×51702006666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51702006661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327310 + ... + 458841.

It is an arithmetic number, because the mean of its divisors is an integer number (3293583804).

Almost surely, 2^51702006666 is an apocalyptic number.

51702006666 is an abundant number, since it is smaller than the sum of its proper divisors (53692675062).

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

51702006666 is a wasteful number, since it uses less digits than its factorization.

51702006666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786366.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 51702006666 in words is "fifty-one billion, seven hundred two million, six thousand, six hundred sixty-six".