668423265 has 8 divisors (see below), whose sum is σ = 1069477248. Its totient is φ = 356492400.

The previous prime is 668423257. The next prime is 668423267. The reversal of 668423265 is 562324866.

It is a happy number.

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

It is not a de Polignac number, because 668423265 - 2³ = 668423257 is a prime.

It is a super-2 number, since 2×668423265² = 893579322386520450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668423267) 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, 22280761 + ... + 22280790.

It is an arithmetic number, because the mean of its divisors is an integer number (133684656).

Almost surely, 2^668423265 is an apocalyptic number.

It is an amenable number.

668423265 is a deficient number, since it is larger than the sum of its proper divisors (401053983).

668423265 is a wasteful number, since it uses less digits than its factorization.

668423265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44561559.

The product of its digits is 414720, while the sum is 42.

The square root of 668423265 is about 25853.8829772241. The cubic root of 668423265 is about 874.3470568270.

It can be divided in two parts, 66842 and 3265, that added together give a palindrome (70107).

The spelling of 668423265 in words is "six hundred sixty-eight million, four hundred twenty-three thousand, two hundred sixty-five".