66886722 has 48 divisors (see below), whose sum is σ = 171767232. Its totient is φ = 19109520.

The previous prime is 66886681. The next prime is 66886723. The reversal of 66886722 is 22768866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66886723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6429 + ... + 13232.

It is an arithmetic number, because the mean of its divisors is an integer number (3578484).

Almost surely, 2^66886722 is an apocalyptic number.

66886722 is an abundant number, since it is smaller than the sum of its proper divisors (104880510).

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

66886722 is a wasteful number, since it uses less digits than its factorization.

66886722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19685 (or 19673 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 66886722 is about 8178.4302894871. The cubic root of 66886722 is about 405.9257833878.

The spelling of 66886722 in words is "sixty-six million, eight hundred eighty-six thousand, seven hundred twenty-two".