91272066 has 16 divisors (see below), whose sum is σ = 182870688. Its totient is φ = 30369600.

The previous prime is 91272061. The next prime is 91272089. The reversal of 91272066 is 66027219.

It is not an unprimeable number, because it can be changed into a prime (91272061) 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, 9895 + ... + 16746.

It is an arithmetic number, because the mean of its divisors is an integer number (11429418).

Almost surely, 2^91272066 is an apocalyptic number.

91272066 is an abundant number, since it is smaller than the sum of its proper divisors (91598622).

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

91272066 is a wasteful number, since it uses less digits than its factorization.

91272066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27217.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 91272066 is about 9553.6415046829. The cubic root of 91272066 is about 450.2419538347.

The spelling of 91272066 in words is "ninety-one million, two hundred seventy-two thousand, sixty-six".