272385666 has 80 divisors (see below), whose sum is σ = 700444800. Its totient is φ = 77500800.

The previous prime is 272385649. The next prime is 272385677. The reversal of 272385666 is 666583272.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 454435 + ... + 455033.

It is an arithmetic number, because the mean of its divisors is an integer number (8755560).

Almost surely, 2^272385666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 272385666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350222400).

272385666 is an abundant number, since it is smaller than the sum of its proper divisors (428059134).

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

272385666 is a wasteful number, since it uses less digits than its factorization.

272385666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 1012 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 272385666 is about 16504.1105788831. The cubic root of 272385666 is about 648.2284431187.

The spelling of 272385666 in words is "two hundred seventy-two million, three hundred eighty-five thousand, six hundred sixty-six".