668014823 has 4 divisors (see below), whose sum is σ = 763445520. Its totient is φ = 572584128.

The previous prime is 668014819. The next prime is 668014871. The reversal of 668014823 is 328410866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668014823 - 2² = 668014819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668014873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47715338 + ... + 47715351.

It is an arithmetic number, because the mean of its divisors is an integer number (190861380).

Almost surely, 2^668014823 is an apocalyptic number.

668014823 is a deficient number, since it is larger than the sum of its proper divisors (95430697).

668014823 is an equidigital number, since it uses as much as digits as its factorization.

668014823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95430696.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 668014823 is about 25845.9827245938. The cubic root of 668014823 is about 874.1689297611.

It can be divided in two parts, 66801 and 4823, that multiplied together give a palindrome (322181223).

The spelling of 668014823 in words is "six hundred sixty-eight million, fourteen thousand, eight hundred twenty-three".