662616540 has 72 divisors (see below), whose sum is σ = 2012970960. Its totient is φ = 176431104.

The previous prime is 662616523. The next prime is 662616553. The reversal of 662616540 is 45616266.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 662616495 and 662616504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136027 + ... + 140813.

It is an arithmetic number, because the mean of its divisors is an integer number (27957930).

Almost surely, 2^662616540 is an apocalyptic number.

662616540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

662616540 is an abundant number, since it is smaller than the sum of its proper divisors (1350354420).

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

662616540 is a wasteful number, since it uses less digits than its factorization.

662616540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571 (or 5566 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 662616540 is about 25741.3391260051. The cubic root of 662616540 is about 871.8078143781.

The spelling of 662616540 in words is "six hundred sixty-two million, six hundred sixteen thousand, five hundred forty".