66700506 has 16 divisors (see below), whose sum is σ = 139201344. Its totient is φ = 21266784.

The previous prime is 66700477. The next prime is 66700519. The reversal of 66700506 is 60500766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241531 + ... + 241806.

It is an arithmetic number, because the mean of its divisors is an integer number (8700084).

Almost surely, 2^66700506 is an apocalyptic number.

66700506 is an abundant number, since it is smaller than the sum of its proper divisors (72500838).

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

66700506 is a wasteful number, since it uses less digits than its factorization.

66700506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483365.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 66700506 is about 8167.0377738811. The cubic root of 66700506 is about 405.5487273205.

The spelling of 66700506 in words is "sixty-six million, seven hundred thousand, five hundred six".