66168250 has 32 divisors (see below), whose sum is σ = 131161680. Its totient is φ = 24908800.

The previous prime is 66168211. The next prime is 66168251. The reversal of 66168250 is 5286166.

It can be written as a sum of positive squares in 8 ways, for example, as 4498641 + 61669609 = 2121^2 + 7853^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (66168251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3535 + ... + 12034.

Almost surely, 2^66168250 is an apocalyptic number.

66168250 is a deficient number, since it is larger than the sum of its proper divisors (64993430).

66168250 is a wasteful number, since it uses less digits than its factorization.

66168250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15603 (or 15593 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 66168250 is about 8134.3868853159. The cubic root of 66168250 is about 404.4671140189.

The spelling of 66168250 in words is "sixty-six million, one hundred sixty-eight thousand, two hundred fifty".