667842266 has 32 divisors (see below), whose sum is σ = 1258118400. Its totient is φ = 264197808.

The previous prime is 667842239. The next prime is 667842277. The reversal of 667842266 is 662248766.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 667842266.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28526 + ... + 46361.

It is an arithmetic number, because the mean of its divisors is an integer number (39316200).

Almost surely, 2^667842266 is an apocalyptic number.

667842266 is a deficient number, since it is larger than the sum of its proper divisors (590276134).

667842266 is a wasteful number, since it uses less digits than its factorization.

667842266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74923 (or 74909 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 667842266 is about 25842.6443306408. The cubic root of 667842266 is about 874.0936535082.

The spelling of 667842266 in words is "six hundred sixty-seven million, eight hundred forty-two thousand, two hundred sixty-six".