665701874 has 16 divisors (see below), whose sum is σ = 1043819520. Its totient is φ = 318034080.

The previous prime is 665701867. The next prime is 665701901. The reversal of 665701874 is 478107566.

It is a super-2 number, since 2×665701874² = 886317970094223752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 7 ways as a sum of consecutive naturals, for example, 63059 + ... + 72854.

It is an arithmetic number, because the mean of its divisors is an integer number (65238720).

Almost surely, 2^665701874 is an apocalyptic number.

665701874 is a deficient number, since it is larger than the sum of its proper divisors (378117646).

665701874 is a wasteful number, since it uses less digits than its factorization.

665701874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136025.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 665701874 is about 25801.1990806629. The cubic root of 665701874 is about 873.1588492720.

The spelling of 665701874 in words is "six hundred sixty-five million, seven hundred one thousand, eight hundred seventy-four".