665253682 has 4 divisors (see below), whose sum is σ = 997880526. Its totient is φ = 332626840.

The previous prime is 665253647. The next prime is 665253689. The reversal of 665253682 is 286352566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 579894561 + 85359121 = 24081^2 + 9239^2 .

It is a super-2 number, since 2×665253682² = 885124922829114248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665253689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166313419 + ... + 166313422.

Almost surely, 2^665253682 is an apocalyptic number.

665253682 is a deficient number, since it is larger than the sum of its proper divisors (332626844).

665253682 is a wasteful number, since it uses less digits than its factorization.

665253682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332626843.

The product of its digits is 518400, while the sum is 43.

The square root of 665253682 is about 25792.5121304614. The cubic root of 665253682 is about 872.9628502898.

It can be divided in two parts, 66525 and 3682, that added together give a palindrome (70207).

The spelling of 665253682 in words is "six hundred sixty-five million, two hundred fifty-three thousand, six hundred eighty-two".