668822437 has 8 divisors (see below), whose sum is σ = 672098400. Its totient is φ = 665555184.

The previous prime is 668822419. The next prime is 668822459. The reversal of 668822437 is 734228866.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668822437 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 (668822417) by changing a digit.

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, 191178 + ... + 194644.

It is an arithmetic number, because the mean of its divisors is an integer number (84012300).

Almost surely, 2^668822437 is an apocalyptic number.

It is an amenable number.

668822437 is a deficient number, since it is larger than the sum of its proper divisors (3275963).

668822437 is a wasteful number, since it uses less digits than its factorization.

668822437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4355.

The product of its digits is 774144, while the sum is 46.

The square root of 668822437 is about 25861.6015938689. The cubic root of 668822437 is about 874.5210710229.

The spelling of 668822437 in words is "six hundred sixty-eight million, eight hundred twenty-two thousand, four hundred thirty-seven".