668088142 has 4 divisors (see below), whose sum is σ = 1002132216. Its totient is φ = 334044070.

The previous prime is 668088101. The next prime is 668088143. The reversal of 668088142 is 241880866.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668088143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167022034 + ... + 167022037.

It is an arithmetic number, because the mean of its divisors is an integer number (250533054).

Almost surely, 2^668088142 is an apocalyptic number.

668088142 is a deficient number, since it is larger than the sum of its proper divisors (334044074).

668088142 is a wasteful number, since it uses less digits than its factorization.

668088142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334044073.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 668088142 is about 25847.4010685794. The cubic root of 668088142 is about 874.2009105120.

The spelling of 668088142 in words is "six hundred sixty-eight million, eighty-eight thousand, one hundred forty-two".