66043674 has 40 divisors (see below), whose sum is σ = 156698388. Its totient is φ = 20718720.

The previous prime is 66043673. The next prime is 66043697. The reversal of 66043674 is 47634066.

It can be written as a sum of positive squares in 2 ways, for example, as 62299449 + 3744225 = 7893^2 + 1935^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66043673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9237 + ... + 14744.

Almost surely, 2^66043674 is an apocalyptic number.

66043674 is an abundant number, since it is smaller than the sum of its proper divisors (90654714).

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

66043674 is a wasteful number, since it uses less digits than its factorization.

66043674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24012 (or 24003 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 66043674 is about 8126.7259089993. The cubic root of 66043674 is about 404.2131223652.

The spelling of 66043674 in words is "sixty-six million, forty-three thousand, six hundred seventy-four".