665274040 has 16 divisors (see below), whose sum is σ = 1496866680. Its totient is φ = 266109600.

The previous prime is 665274031. The next prime is 665274041. The reversal of 665274040 is 40472566.

It is a super-3 number, since 3×665274040³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665273987 and 665274005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665274041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8315886 + ... + 8315965.

Almost surely, 2^665274040 is an apocalyptic number.

It is an amenable number.

665274040 is an abundant number, since it is smaller than the sum of its proper divisors (831592640).

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

665274040 is a wasteful number, since it uses less digits than its factorization.

665274040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16631862 (or 16631858 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 665274040 is about 25792.9067768641. The cubic root of 665274040 is about 872.9717549613.

The spelling of 665274040 in words is "six hundred sixty-five million, two hundred seventy-four thousand, forty".