66625344 has 84 divisors (see below), whose sum is σ = 192995296. Its totient is φ = 21973248.

The previous prime is 66625331. The next prime is 66625373. The reversal of 66625344 is 44352666.

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

It is a junction number, because it is equal to n+sod(n) for n = 66625299 and 66625308.

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, 58767 + ... + 59889.

Almost surely, 2^66625344 is an apocalyptic number.

66625344 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 66625344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96497648).

66625344 is an abundant number, since it is smaller than the sum of its proper divisors (126369952).

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

66625344 is a wasteful number, since it uses less digits than its factorization.

66625344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244 (or 1231 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66625344 is about 8162.4349308279. The cubic root of 66625344 is about 405.3963381208.

The spelling of 66625344 in words is "sixty-six million, six hundred twenty-five thousand, three hundred forty-four".