66717644012245 has 8 divisors (see below), whose sum is σ = 80061237549216. Its totient is φ = 53374072053456.

The previous prime is 66717644012207. The next prime is 66717644012359. The reversal of 66717644012245 is 54221044671766.

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 66717644012245 - 2¹¹ = 66717644010197 is a prime.

It is a super-2 number, since 2×66717644012245² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 2442754 + ... + 11806876.

It is an arithmetic number, because the mean of its divisors is an integer number (10007654693652).

Almost surely, 2^{66717644012245} is an apocalyptic number.

It is an amenable number.

66717644012245 is a deficient number, since it is larger than the sum of its proper divisors (13343593536971).

66717644012245 is a wasteful number, since it uses less digits than its factorization.

66717644012245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789091.

The product of its (nonzero) digits is 13547520, while the sum is 55.

The spelling of 66717644012245 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, two hundred forty-five".