668154876 has 48 divisors (see below), whose sum is σ = 1722518784. Its totient is φ = 200502016.

The previous prime is 668154857. The next prime is 668154947. The reversal of 668154876 is 678451866.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66510 + ... + 75893.

It is an arithmetic number, because the mean of its divisors is an integer number (35885808).

Almost surely, 2^668154876 is an apocalyptic number.

It is an amenable number.

668154876 is an abundant number, since it is smaller than the sum of its proper divisors (1054363908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668154876 is a wasteful number, since it uses less digits than its factorization.

668154876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142450 (or 142448 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 668154876 is about 25848.6919591688. The cubic root of 668154876 is about 874.2300169415.

The spelling of 668154876 in words is "six hundred sixty-eight million, one hundred fifty-four thousand, eight hundred seventy-six".