665510516 has 12 divisors (see below), whose sum is σ = 1270520160. Its totient is φ = 302504760.

The previous prime is 665510471. The next prime is 665510533. The reversal of 665510516 is 615015566.

It is a congruent number.

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, 7562576 + ... + 7562663.

It is an arithmetic number, because the mean of its divisors is an integer number (105876680).

Almost surely, 2^665510516 is an apocalyptic number.

It is an amenable number.

665510516 is a deficient number, since it is larger than the sum of its proper divisors (605009644).

665510516 is a wasteful number, since it uses less digits than its factorization.

665510516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15125254 (or 15125252 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 665510516 is about 25797.4904981085. The cubic root of 665510516 is about 873.0751772110.

It can be divided in two parts, 6655 and 10516, that added together give a palindrome (17171).

The spelling of 665510516 in words is "six hundred sixty-five million, five hundred ten thousand, five hundred sixteen".