91664900 has 18 divisors (see below), whose sum is σ = 198913050. Its totient is φ = 36665920.

The previous prime is 91664893. The next prime is 91664939. The reversal of 91664900 is 946619.

It can be written as a sum of positive squares in 3 ways, for example, as 26894596 + 64770304 = 5186^2 + 8048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458225 + ... + 458424.

It is an arithmetic number, because the mean of its divisors is an integer number (11050725).

Almost surely, 2^91664900 is an apocalyptic number.

It is an amenable number.

91664900 is an abundant number, since it is smaller than the sum of its proper divisors (107248150).

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

91664900 is a wasteful number, since it uses less digits than its factorization.

91664900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916663 (or 916656 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 91664900 is about 9574.1788159612. The cubic root of 91664900 is about 450.8869748548.

The spelling of 91664900 in words is "ninety-one million, six hundred sixty-four thousand, nine hundred".