668194270 has 16 divisors (see below), whose sum is σ = 1203913008. Its totient is φ = 267019200.

The previous prime is 668194237. The next prime is 668194271. The reversal of 668194270 is 72491866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668194271) 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, 21279 + ... + 42298.

It is an arithmetic number, because the mean of its divisors is an integer number (75244563).

Almost surely, 2^668194270 is an apocalyptic number.

668194270 is a deficient number, since it is larger than the sum of its proper divisors (535718738).

668194270 is a wasteful number, since it uses less digits than its factorization.

668194270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64635.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 668194270 is about 25849.4539594166. The cubic root of 668194270 is about 874.2471979583.

The spelling of 668194270 in words is "six hundred sixty-eight million, one hundred ninety-four thousand, two hundred seventy".