66700570 has 16 divisors (see below), whose sum is σ = 120176640. Its totient is φ = 26654544.

The previous prime is 66700559. The next prime is 66700573. The reversal of 66700570 is 7500766.

It is not an unprimeable number, because it can be changed into a prime (66700573) 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, 10471 + ... + 15589.

It is an arithmetic number, because the mean of its divisors is an integer number (7511040).

Almost surely, 2^66700570 is an apocalyptic number.

66700570 is a deficient number, since it is larger than the sum of its proper divisors (53476070).

66700570 is a wasteful number, since it uses less digits than its factorization.

66700570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6429.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 66700570 is about 8167.0416920694. The cubic root of 66700570 is about 405.5488570302.

The spelling of 66700570 in words is "sixty-six million, seven hundred thousand, five hundred seventy".