86665572 has 192 divisors, whose sum is σ = 274176000. Its totient is φ = 23151744.

The previous prime is 86665549. The next prime is 86665577. The reversal of 86665572 is 27556668.

Its product of digits (604800) is a multiple of the sum of its prime factors (175).

It is not an unprimeable number, because it can be changed into a prime (86665577) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1293483 + ... + 1293549.

It is an arithmetic number, because the mean of its divisors is an integer number (1428000).

Almost surely, 2^86665572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86665572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137088000).

86665572 is an abundant number, since it is smaller than the sum of its proper divisors (187510428).

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

86665572 is a wasteful number, since it uses less digits than its factorization.

86665572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 167 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 86665572 is about 9309.4345692958. The cubic root of 86665572 is about 442.5362682137.

The spelling of 86665572 in words is "eighty-six million, six hundred sixty-five thousand, five hundred seventy-two".