66671425584 has 60 divisors (see below), whose sum is σ = 188949290400. Its totient is φ = 21942490752.

The previous prime is 66671425553. The next prime is 66671425589. The reversal of 66671425584 is 48552417666.

66671425584 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66671425584.

It is not an unprimeable number, because it can be changed into a prime (66671425589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2918979 + ... + 2941730.

It is an arithmetic number, because the mean of its divisors is an integer number (3149154840).

Almost surely, 2^66671425584 is an apocalyptic number.

It is an amenable number.

66671425584 is an abundant number, since it is smaller than the sum of its proper divisors (122277864816).

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

66671425584 is a wasteful number, since it uses less digits than its factorization.

66671425584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5860802 (or 5860793 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 66671425584 in words is "sixty-six billion, six hundred seventy-one million, four hundred twenty-five thousand, five hundred eighty-four".