666741344 has 24 divisors (see below), whose sum is σ = 1344665448. Its totient is φ = 325239040.

The previous prime is 666741323. The next prime is 666741353. The reversal of 666741344 is 443147666.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

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, 252782 + ... + 255405.

It is an arithmetic number, because the mean of its divisors is an integer number (56027727).

Almost surely, 2^666741344 is an apocalyptic number.

It is an amenable number.

666741344 is an abundant number, since it is smaller than the sum of its proper divisors (677924104).

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

666741344 is a wasteful number, since it uses less digits than its factorization.

666741344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508238 (or 508230 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The square root of 666741344 is about 25821.3350545629. The cubic root of 666741344 is about 873.6130818482.

The spelling of 666741344 in words is "six hundred sixty-six million, seven hundred forty-one thousand, three hundred forty-four".