1660520788 has 24 divisors (see below), whose sum is σ = 3049038720. Its totient is φ = 789766560.

The previous prime is 1660520753. The next prime is 1660520791. The reversal of 1660520788 is 8870250661.

It is a congruent number.

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, 33208 + ... + 66511.

It is an arithmetic number, because the mean of its divisors is an integer number (127043280).

Almost surely, 2^1660520788 is an apocalyptic number.

It is an amenable number.

1660520788 is a deficient number, since it is larger than the sum of its proper divisors (1388517932).

1660520788 is a wasteful number, since it uses less digits than its factorization.

1660520788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99927 (or 99925 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 1660520788 is about 40749.4881931050. The cubic root of 1660520788 is about 1184.1719575012.

The spelling of 1660520788 in words is "one billion, six hundred sixty million, five hundred twenty thousand, seven hundred eighty-eight".