66979452 has 24 divisors (see below), whose sum is σ = 156427600. Its totient is φ = 22306176.

The previous prime is 66979433. The next prime is 66979459. The reversal of 66979452 is 25497966.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66979459) 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, 17574 + ... + 21042.

Almost surely, 2^66979452 is an apocalyptic number.

It is an amenable number.

66979452 is an abundant number, since it is smaller than the sum of its proper divisors (89448148).

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

66979452 is a wasteful number, since it uses less digits than its factorization.

66979452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085 (or 5083 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 66979452 is about 8184.0975067505. The cubic root of 66979452 is about 406.1132850578.

The spelling of 66979452 in words is "sixty-six million, nine hundred seventy-nine thousand, four hundred fifty-two".