72099566 has 64 divisors (see below), whose sum is σ = 145635840. Its totient is φ = 25920000.

The previous prime is 72099553. The next prime is 72099613. The reversal of 72099566 is 66599027.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119666 + ... + 120266.

It is an arithmetic number, because the mean of its divisors is an integer number (2275560).

Almost surely, 2^72099566 is an apocalyptic number.

72099566 is an abundant number, since it is smaller than the sum of its proper divisors (73536274).

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

72099566 is a wasteful number, since it uses less digits than its factorization.

72099566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 72099566 is about 8491.1463301488. The cubic root of 72099566 is about 416.2084407521.

The spelling of 72099566 in words is "seventy-two million, ninety-nine thousand, five hundred sixty-six".