1660652660 has 24 divisors (see below), whose sum is σ = 3492446496. Its totient is φ = 663294240.

The previous prime is 1660652597. The next prime is 1660652663. The reversal of 1660652660 is 662560661.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660652663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46262 + ... + 73901.

It is an arithmetic number, because the mean of its divisors is an integer number (145518604).

Almost surely, 2^1660652660 is an apocalyptic number.

1660652660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660652660 is an abundant number, since it is smaller than the sum of its proper divisors (1831793836).

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

1660652660 is a wasteful number, since it uses less digits than its factorization.

1660652660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120863 (or 120861 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1660652660 is about 40751.1062426531. The cubic root of 1660652660 is about 1184.2033040908.

The spelling of 1660652660 in words is "one billion, six hundred sixty million, six hundred fifty-two thousand, six hundred sixty".