91669916 has 24 divisors (see below), whose sum is σ = 182926800. Its totient is φ = 39820032.

The previous prime is 91669909. The next prime is 91669943. The reversal of 91669916 is 61996619.

91669916 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50966 + ... + 52733.

It is an arithmetic number, because the mean of its divisors is an integer number (7621950).

Almost surely, 2^91669916 is an apocalyptic number.

It is an amenable number.

91669916 is a deficient number, since it is larger than the sum of its proper divisors (91256884).

91669916 is a wasteful number, since it uses less digits than its factorization.

91669916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103733 (or 103731 counting only the distinct ones).

The product of its digits is 157464, while the sum is 47.

The square root of 91669916 is about 9574.4407669587. The cubic root of 91669916 is about 450.8951990417.

The spelling of 91669916 in words is "ninety-one million, six hundred sixty-nine thousand, nine hundred sixteen".