85664412621 has 24 divisors (see below), whose sum is σ = 128457644224. Its totient is φ = 57048507360.

The previous prime is 85664412607. The next prime is 85664412653. The reversal of 85664412621 is 12621446658.

It is a happy number.

85664412621 is a `hidden beast` number, since 8 + 5 + 6 + 6 + 4 + 4 + 12 + 621 = 666.

It is not a de Polignac number, because 85664412621 - 2²⁵ = 85630858189 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 (85664412671) 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, 39576 + ... + 415806.

Almost surely, 2^85664412621 is an apocalyptic number.

85664412621 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

85664412621 is a deficient number, since it is larger than the sum of its proper divisors (42793231603).

85664412621 is an equidigital number, since it uses as much as digits as its factorization.

85664412621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377183 (or 377171 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 85664412621 in words is "eighty-five billion, six hundred sixty-four million, four hundred twelve thousand, six hundred twenty-one".