99678566 has 24 divisors (see below), whose sum is σ = 163997280. Its totient is φ = 45410976.

The previous prime is 99678563. The next prime is 99678569. The reversal of 99678566 is 66587699.

It is an interprime number because it is at equal distance from previous prime (99678563) and next prime (99678569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99678563) 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, 24836 + ... + 28568.

It is an arithmetic number, because the mean of its divisors is an integer number (6833220).

Almost surely, 2^99678566 is an apocalyptic number.

99678566 is a deficient number, since it is larger than the sum of its proper divisors (64318714).

99678566 is a wasteful number, since it uses less digits than its factorization.

99678566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840 (or 3827 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 56.

The square root of 99678566 is about 9983.9153642246. The cubic root of 99678566 is about 463.6610280659.

The spelling of 99678566 in words is "ninety-nine million, six hundred seventy-eight thousand, five hundred sixty-six".