662721456 has 60 divisors (see below), whose sum is σ = 1773209672. Its totient is φ = 213276672.

The previous prime is 662721419. The next prime is 662721457. The reversal of 662721456 is 654127266.

It is not an unprimeable number, because it can be changed into a prime (662721457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32160 + ... + 48576.

Almost surely, 2^662721456 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 662721456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886604836).

662721456 is an abundant number, since it is smaller than the sum of its proper divisors (1110488216).

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

662721456 is a wasteful number, since it uses less digits than its factorization.

662721456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16486 (or 16451 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 662721456 is about 25743.3769346603. The cubic root of 662721456 is about 871.8538247809.

The spelling of 662721456 in words is "six hundred sixty-two million, seven hundred twenty-one thousand, four hundred fifty-six".