665073376 has 48 divisors (see below), whose sum is σ = 1439399808. Its totient is φ = 299977600.

The previous prime is 665073361. The next prime is 665073377. The reversal of 665073376 is 673370566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665073377) 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, 38901 + ... + 53323.

It is an arithmetic number, because the mean of its divisors is an integer number (29987496).

Almost surely, 2^665073376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665073376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719699904).

665073376 is an abundant number, since it is smaller than the sum of its proper divisors (774326432).

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

665073376 is a wasteful number, since it uses less digits than its factorization.

665073376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14575 (or 14567 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 43.

The square root of 665073376 is about 25789.0165768298. The cubic root of 665073376 is about 872.8839757861.

The spelling of 665073376 in words is "six hundred sixty-five million, seventy-three thousand, three hundred seventy-six".