99900000666 has 24 divisors (see below), whose sum is σ = 222300002964. Its totient is φ = 32400000000.

The previous prime is 99900000643. The next prime is 99900000679. The reversal of 99900000666 is 66600000999.

It can be written as a sum of positive squares in 2 ways, for example, as 93714964641 + 6185036025 = 306129^2 + 78645^2 .

99900000666 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74999335 + ... + 75000666.

Almost surely, 2^99900000666 is an apocalyptic number.

99900000666 is an abundant number, since it is smaller than the sum of its proper divisors (122400002298).

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

99900000666 is a wasteful number, since it uses less digits than its factorization.

99900000666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150000046 (or 150000043 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 99900000666 in words is "ninety-nine billion, nine hundred million, six hundred sixty-six", and thus it is an aban number.