90660999 has 32 divisors (see below), whose sum is σ = 142781184. Its totient is φ = 50446080.

The previous prime is 90660991. The next prime is 90661001. The reversal of 90660999 is 99906609.

It is not a de Polignac number, because 90660999 - 2³ = 90660991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90660991) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 99504 + ... + 100410.

It is an arithmetic number, because the mean of its divisors is an integer number (4461912).

Almost surely, 2^90660999 is an apocalyptic number.

90660999 is a deficient number, since it is larger than the sum of its proper divisors (52120185).

90660999 is a wasteful number, since it uses less digits than its factorization.

90660999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167.

The product of its (nonzero) digits is 236196, while the sum is 48.

The square root of 90660999 is about 9521.6069547110. The cubic root of 90660999 is about 449.2349122846.

The spelling of 90660999 in words is "ninety million, six hundred sixty thousand, nine hundred ninety-nine".