99665522 has 12 divisors (see below), whose sum is σ = 164324958. Its totient is φ = 45302400.

The previous prime is 99665483. The next prime is 99665537. The reversal of 99665522 is 22556699.

It can be written as a sum of positive squares in only one way, i.e., 98227921 + 1437601 = 9911^2 + 1199^2 .

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

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, 205679 + ... + 206162.

Almost surely, 2^99665522 is an apocalyptic number.

99665522 is a deficient number, since it is larger than the sum of its proper divisors (64659436).

99665522 is a wasteful number, since it uses less digits than its factorization.

99665522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411865 (or 411854 counting only the distinct ones).

The product of its digits is 291600, while the sum is 44.

The square root of 99665522 is about 9983.2620921220. The cubic root of 99665522 is about 463.6408021921.

Adding to 99665522 its reverse (22556699), we get a palindrome (122222221).

The spelling of 99665522 in words is "ninety-nine million, six hundred sixty-five thousand, five hundred twenty-two".