1660794165 has 32 divisors (see below), whose sum is σ = 2992986240. Its totient is φ = 873618048.

The previous prime is 1660794151. The next prime is 1660794181. The reversal of 1660794165 is 5614970661.

1660794165 is a `hidden beast` number, since 166 + 0 + 79 + 416 + 5 = 666.

It is not a de Polignac number, because 1660794165 - 2⁹ = 1660793653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1660794165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74407 + ... + 94116.

It is an arithmetic number, because the mean of its divisors is an integer number (93530820).

Almost surely, 2^1660794165 is an apocalyptic number.

1660794165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660794165 is a deficient number, since it is larger than the sum of its proper divisors (1332192075).

1660794165 is a wasteful number, since it uses less digits than its factorization.

1660794165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168610 (or 168604 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1660794165 is about 40752.8424162045. The cubic root of 1660794165 is about 1184.2369386437.

The spelling of 1660794165 in words is "one billion, six hundred sixty million, seven hundred ninety-four thousand, one hundred sixty-five".