66489792 has 56 divisors (see below), whose sum is σ = 181612032. Its totient is φ = 21446400.

The previous prime is 66489769. The next prime is 66489809. The reversal of 66489792 is 29798466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367 + ... + 11537.

It is an arithmetic number, because the mean of its divisors is an integer number (3243072).

Almost surely, 2^66489792 is an apocalyptic number.

66489792 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66489792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90806016).

66489792 is an abundant number, since it is smaller than the sum of its proper divisors (115122240).

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

66489792 is a wasteful number, since it uses less digits than its factorization.

66489792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11217 (or 11207 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 66489792 is about 8154.1272984912. The cubic root of 66489792 is about 405.1212196205.

The spelling of 66489792 in words is "sixty-six million, four hundred eighty-nine thousand, seven hundred ninety-two".