665063215 has 8 divisors (see below), whose sum is σ = 809008848. Its totient is φ = 524761920.

The previous prime is 665063209. The next prime is 665063219. The reversal of 665063215 is 512360566.

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

It is not a de Polignac number, because 665063215 - 2¹⁵ = 665030447 is a prime.

It is a super-2 number, since 2×665063215² = 884618159892272450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665063219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910681 + ... + 911410.

It is an arithmetic number, because the mean of its divisors is an integer number (101126106).

Almost surely, 2^665063215 is an apocalyptic number.

665063215 is a deficient number, since it is larger than the sum of its proper divisors (143945633).

665063215 is a wasteful number, since it uses less digits than its factorization.

665063215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822169.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 665063215 is about 25788.8195736059. The cubic root of 665063215 is about 872.8795304524.

The spelling of 665063215 in words is "six hundred sixty-five million, sixty-three thousand, two hundred fifteen".