662512640 has 88 divisors (see below), whose sum is σ = 1609433280. Its totient is φ = 261644288.

The previous prime is 662512637. The next prime is 662512657. The reversal of 662512640 is 46215266.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 662512597 and 662512606.

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, 424181 + ... + 425739.

Almost surely, 2^662512640 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 662512640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804716640).

662512640 is an abundant number, since it is smaller than the sum of its proper divisors (946920640).

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

662512640 is a wasteful number, since it uses less digits than its factorization.

662512640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 662512640 is about 25739.3208923623. The cubic root of 662512640 is about 871.7622447506.

The spelling of 662512640 in words is "six hundred sixty-two million, five hundred twelve thousand, six hundred forty".