99772566 has 8 divisors (see below), whose sum is σ = 199545144. Its totient is φ = 33257520.

The previous prime is 99772529. The next prime is 99772567. The reversal of 99772566 is 66527799.

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

99772566 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99772567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8314375 + ... + 8314386.

It is an arithmetic number, because the mean of its divisors is an integer number (24943143).

Almost surely, 2^99772566 is an apocalyptic number.

99772566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99772566 is a wasteful number, since it uses less digits than its factorization.

99772566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16628766.

The product of its digits is 1428840, while the sum is 51.

The square root of 99772566 is about 9988.6218268588. The cubic root of 99772566 is about 463.8067312167.

The spelling of 99772566 in words is "ninety-nine million, seven hundred seventy-two thousand, five hundred sixty-six".