66789376 has 56 divisors (see below), whose sum is σ = 138403584. Its totient is φ = 32194560.

The previous prime is 66789323. The next prime is 66789383. The reversal of 66789376 is 67398766.

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, 253821 + ... + 254083.

Almost surely, 2^66789376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66789376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69201792).

66789376 is an abundant number, since it is smaller than the sum of its proper divisors (71614208).

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

66789376 is an equidigital number, since it uses as much as digits as its factorization.

66789376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 296 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 52.

The square root of 66789376 is about 8172.4767359718. The cubic root of 66789376 is about 405.7287615394.

The spelling of 66789376 in words is "sixty-six million, seven hundred eighty-nine thousand, three hundred seventy-six".