99997668 has 36 divisors (see below), whose sum is σ = 254112768. Its totient is φ = 33155760.

The previous prime is 99997649. The next prime is 99997669. The reversal of 99997668 is 86679999.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (99997669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396 + ... + 14147.

It is an arithmetic number, because the mean of its divisors is an integer number (7058688).

Almost surely, 2^99997668 is an apocalyptic number.

It is an amenable number.

99997668 is an abundant number, since it is smaller than the sum of its proper divisors (154115100).

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

99997668 is a wasteful number, since it uses less digits than its factorization.

99997668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14744 (or 14739 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 99997668 is about 9999.8833993202. The cubic root of 99997668 is about 464.1552752715.

The spelling of 99997668 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred sixty-eight".