668277742 has 32 divisors (see below), whose sum is σ = 1162667520. Its totient is φ = 285061920.

The previous prime is 668277691. The next prime is 668277751. The reversal of 668277742 is 247772866.

It is a congruent number.

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, 14359 + ... + 39277.

It is an arithmetic number, because the mean of its divisors is an integer number (36333360).

Almost surely, 2^668277742 is an apocalyptic number.

668277742 is a deficient number, since it is larger than the sum of its proper divisors (494389778).

668277742 is a wasteful number, since it uses less digits than its factorization.

668277742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25008.

The product of its digits is 1580544, while the sum is 49.

The square root of 668277742 is about 25851.0684885557. The cubic root of 668277742 is about 874.2836006069.

The spelling of 668277742 in words is "six hundred sixty-eight million, two hundred seventy-seven thousand, seven hundred forty-two".