1660655656 has 16 divisors (see below), whose sum is σ = 3396795840. Its totient is φ = 754843440.

The previous prime is 1660655639. The next prime is 1660655669. The reversal of 1660655656 is 6565560661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9435456 + ... + 9435631.

It is an arithmetic number, because the mean of its divisors is an integer number (212299740).

Almost surely, 2^1660655656 is an apocalyptic number.

It is an amenable number.

1660655656 is an abundant number, since it is smaller than the sum of its proper divisors (1736140184).

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

1660655656 is a wasteful number, since it uses less digits than its factorization.

1660655656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871104 (or 18871100 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 1660655656 is about 40751.1430023748. The cubic root of 1660655656 is about 1184.2040162347.

The spelling of 1660655656 in words is "one billion, six hundred sixty million, six hundred fifty-five thousand, six hundred fifty-six".