665212414 has 16 divisors (see below), whose sum is σ = 1057004208. Its totient is φ = 312895872.

The previous prime is 665212369. The next prime is 665212447. The reversal of 665212414 is 414212566.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116797 + ... + 122359.

It is an arithmetic number, because the mean of its divisors is an integer number (66062763).

Almost surely, 2^665212414 is an apocalyptic number.

665212414 is a deficient number, since it is larger than the sum of its proper divisors (391791794).

665212414 is a wasteful number, since it uses less digits than its factorization.

665212414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9099.

The product of its digits is 11520, while the sum is 31.

The square root of 665212414 is about 25791.7121184306. The cubic root of 665212414 is about 872.9447989425.

The spelling of 665212414 in words is "six hundred sixty-five million, two hundred twelve thousand, four hundred fourteen".