668598867 has 10 divisors (see below), whose sum is σ = 998771268. Its totient is φ = 445732524.

The previous prime is 668598841. The next prime is 668598871. The reversal of 668598867 is 768895866.

It is not a de Polignac number, because 668598867 - 2⁶ = 668598803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668598877) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4127073 + ... + 4127234.

Almost surely, 2^668598867 is an apocalyptic number.

668598867 is a deficient number, since it is larger than the sum of its proper divisors (330172401).

668598867 is an equidigital number, since it uses as much as digits as its factorization.

668598867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8254319 (or 8254310 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The square root of 668598867 is about 25857.2788011422. The cubic root of 668598867 is about 874.4236169233.

The spelling of 668598867 in words is "six hundred sixty-eight million, five hundred ninety-eight thousand, eight hundred sixty-seven".