668162469 has 32 divisors (see below), whose sum is σ = 978130944. Its totient is φ = 403220160.

The previous prime is 668162461. The next prime is 668162471. The reversal of 668162469 is 964261866.

It is a happy number.

It is not a de Polignac number, because 668162469 - 2³ = 668162461 is a prime.

It is a super-2 number, since 2×668162469² = 892882169960351922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668162461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628032 + ... + 629094.

It is an arithmetic number, because the mean of its divisors is an integer number (30566592).

Almost surely, 2^668162469 is an apocalyptic number.

It is an amenable number.

668162469 is a deficient number, since it is larger than the sum of its proper divisors (309968475).

668162469 is a wasteful number, since it uses less digits than its factorization.

668162469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377.

The product of its digits is 746496, while the sum is 48.

The square root of 668162469 is about 25848.8388327213. The cubic root of 668162469 is about 874.2333285506.

The spelling of 668162469 in words is "six hundred sixty-eight million, one hundred sixty-two thousand, four hundred sixty-nine".