72066170 has 32 divisors (see below), whose sum is σ = 143320320. Its totient is φ = 25871040.

The previous prime is 72066149. The next prime is 72066173. The reversal of 72066170 is 7166027.

It is not an unprimeable number, because it can be changed into a prime (72066173) by changing a digit.

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, 4544 + ... + 12836.

It is an arithmetic number, because the mean of its divisors is an integer number (4478760).

Almost surely, 2^72066170 is an apocalyptic number.

72066170 is a deficient number, since it is larger than the sum of its proper divisors (71254150).

72066170 is a wasteful number, since it uses less digits than its factorization.

72066170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8390.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 72066170 is about 8489.1795834462. The cubic root of 72066170 is about 416.1441692431.

The spelling of 72066170 in words is "seventy-two million, sixty-six thousand, one hundred seventy".