91251066 has 16 divisors (see below), whose sum is σ = 182858688. Its totient is φ = 30357600.

The previous prime is 91251047. The next prime is 91251079. The reversal of 91251066 is 66015219.

It is a super-2 number, since 2×91251066² = 16653514092272712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11470 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (11428668).

Almost surely, 2^91251066 is an apocalyptic number.

91251066 is an abundant number, since it is smaller than the sum of its proper divisors (91607622).

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

91251066 is a wasteful number, since it uses less digits than its factorization.

91251066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29717.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 91251066 is about 9552.5423840986. The cubic root of 91251066 is about 450.2074204275.

The spelling of 91251066 in words is "ninety-one million, two hundred fifty-one thousand, sixty-six".