99666654 has 32 divisors (see below), whose sum is σ = 207277056. Its totient is φ = 31922880.

The previous prime is 99666653. The next prime is 99666661. The reversal of 99666654 is 45666699.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99666597 and 99666606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99666653) 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, 13459 + ... + 19505.

It is an arithmetic number, because the mean of its divisors is an integer number (6477408).

Almost surely, 2^99666654 is an apocalyptic number.

99666654 is an abundant number, since it is smaller than the sum of its proper divisors (107610402).

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

99666654 is a wasteful number, since it uses less digits than its factorization.

99666654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160.

The product of its digits is 2099520, while the sum is 51.

The square root of 99666654 is about 9983.3187868564. The cubic root of 99666654 is about 463.6425575280.

The spelling of 99666654 in words is "ninety-nine million, six hundred sixty-six thousand, six hundred fifty-four".