668287046 has 8 divisors (see below), whose sum is σ = 1145634960. Its totient is φ = 286408728.

The previous prime is 668287043. The next prime is 668287091. The reversal of 668287046 is 640782866.

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

It is a super-2 number, since 2×668287046² = 893215151702812232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668287043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23867381 + ... + 23867408.

It is an arithmetic number, because the mean of its divisors is an integer number (143204370).

Almost surely, 2^668287046 is an apocalyptic number.

668287046 is a deficient number, since it is larger than the sum of its proper divisors (477347914).

668287046 is a wasteful number, since it uses less digits than its factorization.

668287046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47734798.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 668287046 is about 25851.2484418064. The cubic root of 668287046 is about 874.2876579503.

The spelling of 668287046 in words is "six hundred sixty-eight million, two hundred eighty-seven thousand, forty-six".