665622980 has 24 divisors (see below), whose sum is σ = 1524882240. Its totient is φ = 242044640.

The previous prime is 665622959. The next prime is 665623001. The reversal of 665622980 is 89226566.

665622980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (665622959) and next prime (665623001).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512560 + ... + 1512999.

It is an arithmetic number, because the mean of its divisors is an integer number (63536760).

Almost surely, 2^665622980 is an apocalyptic number.

It is an amenable number.

665622980 is an abundant number, since it is smaller than the sum of its proper divisors (859259260).

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

665622980 is a wasteful number, since it uses less digits than its factorization.

665622980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025579 (or 3025577 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 665622980 is about 25799.6701529303. The cubic root of 665622980 is about 873.1243544937.

The spelling of 665622980 in words is "six hundred sixty-five million, six hundred twenty-two thousand, nine hundred eighty".