51000001500666 has 16 divisors (see below), whose sum is σ = 104487807953088. Its totient is φ = 16585366341600.

The previous prime is 51000001500653. The next prime is 51000001500697. The reversal of 51000001500666 is 66600510000015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103658539390 + ... + 103658539881.

It is an arithmetic number, because the mean of its divisors is an integer number (6530487997068).

Almost surely, 2^{51000001500666} is an apocalyptic number.

51000001500666 is an abundant number, since it is smaller than the sum of its proper divisors (53487806452422).

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

51000001500666 is a wasteful number, since it uses less digits than its factorization.

51000001500666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207317079317.

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 51000001500666 in words is "fifty-one trillion, one million, five hundred thousand, six hundred sixty-six".