665274730 has 8 divisors (see below), whose sum is σ = 1197494532. Its totient is φ = 266109888.

The previous prime is 665274677. The next prime is 665274749. The reversal of 665274730 is 37472566.

It can be written as a sum of positive squares in 2 ways, for example, as 619860609 + 45414121 = 24897^2 + 6739^2 .

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

It is a super-3 number, since 3×665274730³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33263727 + ... + 33263746.

Almost surely, 2^665274730 is an apocalyptic number.

665274730 is a deficient number, since it is larger than the sum of its proper divisors (532219802).

665274730 is a wasteful number, since it uses less digits than its factorization.

665274730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66527480.

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 665274730 is about 25792.9201526310. The cubic root of 665274730 is about 872.9720567669.

The spelling of 665274730 in words is "six hundred sixty-five million, two hundred seventy-four thousand, seven hundred thirty".