660377344 has 54 divisors (see below), whose sum is σ = 1448971160. Its totient is φ = 300157440.

The previous prime is 660377329. The next prime is 660377351. The reversal of 660377344 is 443773066.

It is a junction number, because it is equal to n+sod(n) for n = 660377297 and 660377306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20317 + ... + 41635.

Almost surely, 2^660377344 is an apocalyptic number.

660377344 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 660377344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724485580).

660377344 is an abundant number, since it is smaller than the sum of its proper divisors (788593816).

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

660377344 is a wasteful number, since it uses less digits than its factorization.

660377344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21357 (or 21332 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 40.

The square root of 660377344 is about 25697.8081555607. The cubic root of 660377344 is about 870.8246657186.

The spelling of 660377344 in words is "six hundred sixty million, three hundred seventy-seven thousand, three hundred forty-four".