662656680 has 512 divisors, whose sum is σ = 2731622400. Its totient is φ = 139594752.

The previous prime is 662656609. The next prime is 662656681. The reversal of 662656680 is 86656266.

662656680 is a `hidden beast` number, since 6 + 6 + 2 + 6 + 566 + 80 = 666.

It is a super-2 number, since 2×662656680² = 878227751097244800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (662656681) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6433509 + ... + 6433611.

It is an arithmetic number, because the mean of its divisors is an integer number (5335200).

Almost surely, 2^662656680 is an apocalyptic number.

662656680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662656680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1365811200).

662656680 is an abundant number, since it is smaller than the sum of its proper divisors (2068965720).

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

662656680 is a wasteful number, since it uses less digits than its factorization.

662656680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 662656680 is about 25742.1187939144. The cubic root of 662656680 is about 871.8254181540.

The spelling of 662656680 in words is "six hundred sixty-two million, six hundred fifty-six thousand, six hundred eighty".