66290727241921 has 24 divisors (see below), whose sum is σ = 85724414409984. Its totient is φ = 50757876923040.

The previous prime is 66290727241919. The next prime is 66290727241951. The reversal of 66290727241921 is 12914272709266.

It is not a de Polignac number, because 66290727241921 - 2¹ = 66290727241919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66290727241901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1678481475 + ... + 1678520968.

It is an arithmetic number, because the mean of its divisors is an integer number (3571850600416).

Almost surely, 2^{66290727241921} is an apocalyptic number.

It is an amenable number.

66290727241921 is a deficient number, since it is larger than the sum of its proper divisors (19433687168063).

66290727241921 is a wasteful number, since it uses less digits than its factorization.

66290727241921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357002501 (or 3357002494 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 66290727241921 in words is "sixty-six trillion, two hundred ninety billion, seven hundred twenty-seven million, two hundred forty-one thousand, nine hundred twenty-one".