662749440 has 144 divisors (see below), whose sum is σ = 2137762368. Its totient is φ = 174972928.

The previous prime is 662749421. The next prime is 662749463. The reversal of 662749440 is 44947266.

It is a junction number, because it is equal to n+sod(n) for n = 662749392 and 662749401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410074 + ... + 411686.

It is an arithmetic number, because the mean of its divisors is an integer number (14845572).

Almost surely, 2^662749440 is an apocalyptic number.

662749440 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 662749440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1068881184).

662749440 is an abundant number, since it is smaller than the sum of its proper divisors (1475012928).

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

662749440 is a wasteful number, since it uses less digits than its factorization.

662749440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 662749440 is about 25743.9204473600. The cubic root of 662749440 is about 871.8660962079.

The spelling of 662749440 in words is "six hundred sixty-two million, seven hundred forty-nine thousand, four hundred forty".