99967665 has 16 divisors (see below), whose sum is σ = 182798208. Its totient is φ = 45699456.

The previous prime is 99967649. The next prime is 99967687. The reversal of 99967665 is 56676999.

It is not a de Polignac number, because 99967665 - 2⁴ = 99967649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475932 + ... + 476141.

It is an arithmetic number, because the mean of its divisors is an integer number (11424888).

Almost surely, 2^99967665 is an apocalyptic number.

It is an amenable number.

99967665 is a deficient number, since it is larger than the sum of its proper divisors (82830543).

99967665 is a wasteful number, since it uses less digits than its factorization.

99967665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952088.

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

The square root of 99967665 is about 9998.3831192848. The cubic root of 99967665 is about 464.1088493764.

The spelling of 99967665 in words is "ninety-nine million, nine hundred sixty-seven thousand, six hundred sixty-five".