66828444627 has 24 divisors (see below), whose sum is σ = 106453897984. Its totient is φ = 36527342544.

The previous prime is 66828444619. The next prime is 66828444713. The reversal of 66828444627 is 72644482866.

It is not a de Polignac number, because 66828444627 - 2³ = 66828444619 is a prime.

It is a super-2 number, since 2×66828444627² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66828444607) 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, 2996743 + ... + 3018960.

Almost surely, 2^66828444627 is an apocalyptic number.

66828444627 is a deficient number, since it is larger than the sum of its proper divisors (39625453357).

66828444627 is a wasteful number, since it uses less digits than its factorization.

66828444627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015759 (or 6015736 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 57.

The spelling of 66828444627 in words is "sixty-six billion, eight hundred twenty-eight million, four hundred forty-four thousand, six hundred twenty-seven".