66365668556701 has 8 divisors (see below), whose sum is σ = 66477111480000. Its totient is φ = 66254253006528.

The previous prime is 66365668556659. The next prime is 66365668556711. The reversal of 66365668556701 is 10765586656366.

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 66365668556701 - 2²¹ = 66365666459549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66365668556711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987356 + ... + 11691061.

It is an arithmetic number, because the mean of its divisors is an integer number (8309638935000).

Almost surely, 2^{66365668556701} is an apocalyptic number.

It is an amenable number.

66365668556701 is a deficient number, since it is larger than the sum of its proper divisors (111442923299).

66365668556701 is a wasteful number, since it uses less digits than its factorization.

66365668556701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13686563.

The product of its (nonzero) digits is 979776000, while the sum is 70.

The spelling of 66365668556701 in words is "sixty-six trillion, three hundred sixty-five billion, six hundred sixty-eight million, five hundred fifty-six thousand, seven hundred one".