66717644012315 has 8 divisors (see below), whose sum is σ = 80061395554800. Its totient is φ = 53373966716512.

The previous prime is 66717644012207. The next prime is 66717644012359. The reversal of 66717644012315 is 51321044671766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66717644012315 - 2³⁸ = 66442766105371 is a prime.

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, 16565240 + ... + 20195109.

It is an arithmetic number, because the mean of its divisors is an integer number (10007674444350).

Almost surely, 2^{66717644012315} is an apocalyptic number.

66717644012315 is a deficient number, since it is larger than the sum of its proper divisors (13343751542485).

66717644012315 is a wasteful number, since it uses less digits than its factorization.

66717644012315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37123341.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 66717644012315 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, three hundred fifteen".