66750606 has 36 divisors (see below), whose sum is σ = 156614328. Its totient is φ = 20537712.

The previous prime is 66750599. The next prime is 66750611. The reversal of 66750606 is 60605766.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7930 + ... + 14013.

It is an arithmetic number, because the mean of its divisors is an integer number (4350398).

Almost surely, 2^66750606 is an apocalyptic number.

66750606 is an abundant number, since it is smaller than the sum of its proper divisors (89863722).

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

66750606 is a wasteful number, since it uses less digits than its factorization.

66750606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21977 (or 21961 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 66750606 is about 8170.1044056976. The cubic root of 66750606 is about 405.6502403250.

The spelling of 66750606 in words is "sixty-six million, seven hundred fifty thousand, six hundred six".