662649920 has 28 divisors (see below), whose sum is σ = 1577935884. Its totient is φ = 265059840.

The previous prime is 662649917. The next prime is 662649929. The reversal of 662649920 is 29946266.

It can be written as a sum of positive squares in 2 ways, for example, as 119946304 + 542703616 = 10952^2 + 23296^2 .

It is not an unprimeable number, because it can be changed into a prime (662649929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035071 + ... + 1035710.

It is an arithmetic number, because the mean of its divisors is an integer number (56354853).

Almost surely, 2^662649920 is an apocalyptic number.

It is an amenable number.

662649920 is an abundant number, since it is smaller than the sum of its proper divisors (915285964).

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

662649920 is a wasteful number, since it uses less digits than its factorization.

662649920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070798 (or 2070788 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 662649920 is about 25741.9874912564. The cubic root of 662649920 is about 871.8224535419.

The spelling of 662649920 in words is "six hundred sixty-two million, six hundred forty-nine thousand, nine hundred twenty".