99669657 has 32 divisors (see below), whose sum is σ = 147197952. Its totient is φ = 59721984.

The previous prime is 99669653. The next prime is 99669659. The reversal of 99669657 is 75696699.

It is not a de Polignac number, because 99669657 - 2² = 99669653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99669597 and 99669606.

It is not an unprimeable number, because it can be changed into a prime (99669653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102588 + ... + 103554.

It is an arithmetic number, because the mean of its divisors is an integer number (4599936).

Almost surely, 2^99669657 is an apocalyptic number.

It is an amenable number.

99669657 is a deficient number, since it is larger than the sum of its proper divisors (47528295).

99669657 is a wasteful number, since it uses less digits than its factorization.

99669657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077.

The product of its digits is 5511240, while the sum is 57.

The square root of 99669657 is about 9983.4691866104. The cubic root of 99669657 is about 463.6472140657.

The spelling of 99669657 in words is "ninety-nine million, six hundred sixty-nine thousand, six hundred fifty-seven".