72665772 has 24 divisors (see below), whose sum is σ = 170107392. Its totient is φ = 24142800.

The previous prime is 72665771. The next prime is 72665773. The reversal of 72665772 is 27756627.

It is an interprime number because it is at equal distance from previous prime (72665771) and next prime (72665773).

It is not an unprimeable number, because it can be changed into a prime (72665771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6004 + ... + 13467.

It is an arithmetic number, because the mean of its divisors is an integer number (7087808).

Almost surely, 2^72665772 is an apocalyptic number.

It is an amenable number.

72665772 is an abundant number, since it is smaller than the sum of its proper divisors (97441620).

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

72665772 is a wasteful number, since it uses less digits than its factorization.

72665772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19789 (or 19787 counting only the distinct ones).

The product of its digits is 246960, while the sum is 42.

The square root of 72665772 is about 8524.4220918488. The cubic root of 72665772 is about 417.2951116777.

It can be divided in two parts, 72665 and 772, that added together give a palindrome (73437).

The spelling of 72665772 in words is "seventy-two million, six hundred sixty-five thousand, seven hundred seventy-two".