66696384 has 112 divisors (see below), whose sum is σ = 190195200. Its totient is φ = 20560896.

The previous prime is 66696367. The next prime is 66696451. The reversal of 66696384 is 48369666.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171262 + ... + 171650.

Almost surely, 2^66696384 is an apocalyptic number.

66696384 is a gapful number since it is divisible by the number (64) 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 66696384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95097600).

66696384 is an abundant number, since it is smaller than the sum of its proper divisors (123498816).

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

66696384 is a wasteful number, since it uses less digits than its factorization.

66696384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 460 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 66696384 is about 8166.7854141027. The cubic root of 66696384 is about 405.5403730296.

The spelling of 66696384 in words is "sixty-six million, six hundred ninety-six thousand, three hundred eighty-four".