668145142 has 8 divisors (see below), whose sum is σ = 1145391696. Its totient is φ = 286347912.

The previous prime is 668145133. The next prime is 668145151. The reversal of 668145142 is 241541866.

It is an interprime number because it is at equal distance from previous prime (668145133) and next prime (668145151).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23862313 + ... + 23862340.

It is an arithmetic number, because the mean of its divisors is an integer number (143173962).

Almost surely, 2^668145142 is an apocalyptic number.

668145142 is a deficient number, since it is larger than the sum of its proper divisors (477246554).

668145142 is a wasteful number, since it uses less digits than its factorization.

668145142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47724662.

The product of its digits is 46080, while the sum is 37.

The square root of 668145142 is about 25848.5036704255. The cubic root of 668145142 is about 874.2257715204.

The spelling of 668145142 in words is "six hundred sixty-eight million, one hundred forty-five thousand, one hundred forty-two".