66986448 has 20 divisors (see below), whose sum is σ = 173048448. Its totient is φ = 22328800.

The previous prime is 66986411. The next prime is 66986489. The reversal of 66986448 is 84468966.

It is a self number, because there is not a number n which added to its sum of digits gives 66986448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697728 + ... + 697823.

Almost surely, 2^66986448 is an apocalyptic number.

It is an amenable number.

66986448 is an abundant number, since it is smaller than the sum of its proper divisors (106062000).

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

66986448 is a wasteful number, since it uses less digits than its factorization.

66986448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395562 (or 1395556 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The square root of 66986448 is about 8184.5249098527. The cubic root of 66986448 is about 406.1274240688.

The spelling of 66986448 in words is "sixty-six million, nine hundred eighty-six thousand, four hundred forty-eight".