668367935 has 4 divisors (see below), whose sum is σ = 802041528. Its totient is φ = 534694344.

The previous prime is 668367913. The next prime is 668367941. The reversal of 668367935 is 539763866.

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 668367935 - 2¹⁸ = 668105791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66836789 + ... + 66836798.

It is an arithmetic number, because the mean of its divisors is an integer number (200510382).

Almost surely, 2^668367935 is an apocalyptic number.

668367935 is a deficient number, since it is larger than the sum of its proper divisors (133673593).

668367935 is a wasteful number, since it uses less digits than its factorization.

668367935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133673592.

The product of its digits is 4898880, while the sum is 53.

The square root of 668367935 is about 25852.8129030479. The cubic root of 668367935 is about 874.3229309175.

The spelling of 668367935 in words is "six hundred sixty-eight million, three hundred sixty-seven thousand, nine hundred thirty-five".