66660748 has 24 divisors (see below), whose sum is σ = 145442304. Its totient is φ = 25971600.

The previous prime is 66660731. The next prime is 66660749. The reversal of 66660748 is 84706666.

It is not an unprimeable number, because it can be changed into a prime (66660749) 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, 107908 + ... + 108523.

It is an arithmetic number, because the mean of its divisors is an integer number (6060096).

Almost surely, 2^66660748 is an apocalyptic number.

It is an amenable number.

66660748 is an abundant number, since it is smaller than the sum of its proper divisors (78781556).

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

66660748 is a wasteful number, since it uses less digits than its factorization.

66660748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216453 (or 216451 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 66660748 is about 8164.6033584002. The cubic root of 66660748 is about 405.4681331744.

The spelling of 66660748 in words is "sixty-six million, six hundred sixty thousand, seven hundred forty-eight".