99776664 has 64 divisors (see below), whose sum is σ = 298485600. Its totient is φ = 30699648.

The previous prime is 99776659. The next prime is 99776669. The reversal of 99776664 is 46667799.

It is an interprime number because it is at equal distance from previous prime (99776659) and next prime (99776669).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99776664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99776669) 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, 14959 + ... + 20574.

Almost surely, 2^99776664 is an apocalyptic number.

It is an amenable number.

99776664 is an abundant number, since it is smaller than the sum of its proper divisors (198708936).

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

99776664 is a wasteful number, since it uses less digits than its factorization.

99776664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35561 (or 35551 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 99776664 is about 9988.8269581568. The cubic root of 99776664 is about 463.8130811719.

It can be divided in two parts, 9977 and 6664, that added together give a square (16641 = 129²).

The spelling of 99776664 in words is "ninety-nine million, seven hundred seventy-six thousand, six hundred sixty-four".