72072066 has 32 divisors (see below), whose sum is σ = 157578048. Its totient is φ = 21794240.

The previous prime is 72072053. The next prime is 72072079. The reversal of 72072066 is 66027027.

It is an interprime number because it is at equal distance from previous prime (72072053) and next prime (72072079).

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 15 ways as a sum of consecutive naturals, for example, 43876 + ... + 45488.

It is an arithmetic number, because the mean of its divisors is an integer number (4924314).

Almost surely, 2^72072066 is an apocalyptic number.

72072066 is an abundant number, since it is smaller than the sum of its proper divisors (85505982).

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

72072066 is a wasteful number, since it uses less digits than its factorization.

72072066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 72072066 is about 8489.5268419388. The cubic root of 72072066 is about 416.1555176984.

The spelling of 72072066 in words is "seventy-two million, seventy-two thousand, sixty-six".