99663642 has 32 divisors (see below), whose sum is σ = 238512960. Its totient is φ = 30665520.

The previous prime is 99663617. The next prime is 99663643. The reversal of 99663642 is 24636699.

99663642 is a `hidden beast` number, since 9 + 9 + 6 + 636 + 4 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (99663643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70284 + ... + 71687.

It is an arithmetic number, because the mean of its divisors is an integer number (7453530).

Almost surely, 2^99663642 is an apocalyptic number.

99663642 is an abundant number, since it is smaller than the sum of its proper divisors (138849318).

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

99663642 is a wasteful number, since it uses less digits than its factorization.

99663642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141995 (or 141989 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 99663642 is about 9983.1679340778. The cubic root of 99663642 is about 463.6378869406.

The spelling of 99663642 in words is "ninety-nine million, six hundred sixty-three thousand, six hundred forty-two".