72570066 has 16 divisors (see below), whose sum is σ = 146772000. Its totient is φ = 23918048.

The previous prime is 72570011. The next prime is 72570067. The reversal of 72570066 is 66007527.

It is not an unprimeable number, because it can be changed into a prime (72570067) 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, 67416 + ... + 68483.

It is an arithmetic number, because the mean of its divisors is an integer number (9173250).

Almost surely, 2^72570066 is an apocalyptic number.

72570066 is an abundant number, since it is smaller than the sum of its proper divisors (74201934).

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

72570066 is a wasteful number, since it uses less digits than its factorization.

72570066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135993.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 72570066 is about 8518.8066065617. The cubic root of 72570066 is about 417.1118287222. Note that the first 3 decimals are identical.

The spelling of 72570066 in words is "seventy-two million, five hundred seventy thousand, sixty-six".