662759980 has 96 divisors (see below), whose sum is σ = 1468212480. Its totient is φ = 251116800.

The previous prime is 662759941. The next prime is 662759983. The reversal of 662759980 is 89957266.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (662759983) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6561930 + ... + 6562030.

It is an arithmetic number, because the mean of its divisors is an integer number (15293880).

Almost surely, 2^662759980 is an apocalyptic number.

It is an amenable number.

662759980 is an abundant number, since it is smaller than the sum of its proper divisors (805452500).

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

662759980 is a wasteful number, since it uses less digits than its factorization.

662759980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 662759980 is about 25744.1251550718. The cubic root of 662759980 is about 871.8707180753.

The spelling of 662759980 in words is "six hundred sixty-two million, seven hundred fifty-nine thousand, nine hundred eighty".