665274105 has 48 divisors (see below), whose sum is σ = 1201734144. Its totient is φ = 340081920.

The previous prime is 665274079. The next prime is 665274119. The reversal of 665274105 is 501472566.

It is a happy number.

It is not a de Polignac number, because 665274105 - 2⁶ = 665274041 is a prime.

It is a super-3 number, since 3×665274105³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665274105.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147037 + ... + 151493.

It is an arithmetic number, because the mean of its divisors is an integer number (25036128).

Almost surely, 2^665274105 is an apocalyptic number.

It is an amenable number.

665274105 is a deficient number, since it is larger than the sum of its proper divisors (536460039).

665274105 is a wasteful number, since it uses less digits than its factorization.

665274105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606 (or 4603 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 665274105 is about 25792.9080369004. The cubic root of 665274105 is about 872.9717833922.

The spelling of 665274105 in words is "six hundred sixty-five million, two hundred seventy-four thousand, one hundred five".