66365224570641 has 16 divisors (see below), whose sum is σ = 90349951236480. Its totient is φ = 43321643249280.

The previous prime is 66365224570583. The next prime is 66365224570643. The reversal of 66365224570641 is 14607542256366.

It is a happy number.

It is not a de Polignac number, because 66365224570641 - 2²¹ = 66365222473489 is a prime.

It is a super-2 number, since 2×66365224570641² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66365224570643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206569070 + ... + 1206624071.

It is an arithmetic number, because the mean of its divisors is an integer number (5646871952280).

Almost surely, 2^{66365224570641} is an apocalyptic number.

It is an amenable number.

66365224570641 is a deficient number, since it is larger than the sum of its proper divisors (23984726665839).

66365224570641 is a wasteful number, since it uses less digits than its factorization.

66365224570641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413193336.

The product of its (nonzero) digits is 43545600, while the sum is 57.

The spelling of 66365224570641 in words is "sixty-six trillion, three hundred sixty-five billion, two hundred twenty-four million, five hundred seventy thousand, six hundred forty-one".