91366999620 has 96 divisors (see below), whose sum is σ = 277197255552. Its totient is φ = 22352329728.

The previous prime is 91366999583. The next prime is 91366999627. The reversal of 91366999620 is 2699966319.

It is a happy number.

It is a super-2 number, since 2×91366999620² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (91366999627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232177 + ... + 486456.

It is an arithmetic number, because the mean of its divisors is an integer number (2887471412).

Almost surely, 2^91366999620 is an apocalyptic number.

It is an amenable number.

91366999620 is an abundant number, since it is smaller than the sum of its proper divisors (185830255932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91366999620 is a wasteful number, since it uses less digits than its factorization.

91366999620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718821 (or 718819 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 60.

The spelling of 91366999620 in words is "ninety-one billion, three hundred sixty-six million, nine hundred ninety-nine thousand, six hundred twenty".