66800713315 has 32 divisors (see below), whose sum is σ = 93044246400. Its totient is φ = 45095737344.

The previous prime is 66800713313. The next prime is 66800713319. The reversal of 66800713315 is 51331700866.

It is a happy number.

It is not a de Polignac number, because 66800713315 - 2¹ = 66800713313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66800713313) 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, 532617 + ... + 645973.

It is an arithmetic number, because the mean of its divisors is an integer number (2907632700).

Almost surely, 2^66800713315 is an apocalyptic number.

66800713315 is a deficient number, since it is larger than the sum of its proper divisors (26243533085).

66800713315 is a wasteful number, since it uses less digits than its factorization.

66800713315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113631.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 66800713315 in words is "sixty-six billion, eight hundred million, seven hundred thirteen thousand, three hundred fifteen".