1660990163 has 8 divisors (see below), whose sum is σ = 1902808320. Its totient is φ = 1420305480.

The previous prime is 1660990139. The next prime is 1660990181. The reversal of 1660990163 is 3610990661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1660990163 - 2⁸ = 1660989907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1660990163.

It is not an unprimeable number, because it can be changed into a prime (1660990363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280223 + ... + 286088.

It is an arithmetic number, because the mean of its divisors is an integer number (237851040).

Almost surely, 2^1660990163 is an apocalyptic number.

1660990163 is a deficient number, since it is larger than the sum of its proper divisors (241818157).

1660990163 is an equidigital number, since it uses as much as digits as its factorization.

1660990163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566737.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1660990163 is about 40755.2470609614. The cubic root of 1660990163 is about 1184.2835225704.

The spelling of 1660990163 in words is "one billion, six hundred sixty million, nine hundred ninety thousand, one hundred sixty-three".