668042850 has 96 divisors (see below), whose sum is σ = 1756226880. Its totient is φ = 167581440.

The previous prime is 668042849. The next prime is 668042873. The reversal of 668042850 is 58240866.

It is a super-2 number, since 2×668042850² = 892562498872245000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668042799 and 668042808.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 446704 + ... + 448196.

It is an arithmetic number, because the mean of its divisors is an integer number (18294030).

Almost surely, 2^668042850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668042850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878113440).

668042850 is an abundant number, since it is smaller than the sum of its proper divisors (1088184030).

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

668042850 is a wasteful number, since it uses less digits than its factorization.

668042850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 668042850 is about 25846.5249114847. The cubic root of 668042850 is about 874.1811550337.

The spelling of 668042850 in words is "six hundred sixty-eight million, forty-two thousand, eight hundred fifty".