66117456 has 60 divisors (see below), whose sum is σ = 193091808. Its totient is φ = 21079872.

The previous prime is 66117427. The next prime is 66117463. The reversal of 66117456 is 65471166.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 66117456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6670 + ... + 13293.

Almost surely, 2^66117456 is an apocalyptic number.

It is an amenable number.

66117456 is an abundant number, since it is smaller than the sum of its proper divisors (126974352).

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

66117456 is a wasteful number, since it uses less digits than its factorization.

66117456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20000 (or 19991 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 66117456 is about 8131.2641083659. The cubic root of 66117456 is about 404.3635912477.

The spelling of 66117456 in words is "sixty-six million, one hundred seventeen thousand, four hundred fifty-six".