99966590 has 8 divisors (see below), whose sum is σ = 179939880. Its totient is φ = 39986632.

The previous prime is 99966589. The next prime is 99966631. The reversal of 99966590 is 9566999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4998320 + ... + 4998339.

It is an arithmetic number, because the mean of its divisors is an integer number (22492485).

Almost surely, 2^99966590 is an apocalyptic number.

99966590 is a deficient number, since it is larger than the sum of its proper divisors (79973290).

99966590 is a wasteful number, since it uses less digits than its factorization.

99966590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9996666.

The product of its (nonzero) digits is 1180980, while the sum is 53.

The square root of 99966590 is about 9998.3293604482. The cubic root of 99966590 is about 464.1071857758.

The spelling of 99966590 in words is "ninety-nine million, nine hundred sixty-six thousand, five hundred ninety".