66384344 has 32 divisors (see below), whose sum is σ = 134447040. Its totient is φ = 30547200.

The previous prime is 66384343. The next prime is 66384359. The reversal of 66384344 is 44348366.

It is a super-2 number, since 2×66384344² = 8813762256620672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66384298 and 66384307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66384341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44084 + ... + 45564.

It is an arithmetic number, because the mean of its divisors is an integer number (4201470).

Almost surely, 2^66384344 is an apocalyptic number.

It is an amenable number.

66384344 is an abundant number, since it is smaller than the sum of its proper divisors (68062696).

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

66384344 is a wasteful number, since it uses less digits than its factorization.

66384344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931 (or 1927 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 66384344 is about 8147.6588048347. The cubic root of 66384344 is about 404.9069419888.

The spelling of 66384344 in words is "sixty-six million, three hundred eighty-four thousand, three hundred forty-four".