66336674 has 4 divisors (see below), whose sum is σ = 99505014. Its totient is φ = 33168336.

The previous prime is 66336661. The next prime is 66336679. The reversal of 66336674 is 47663366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47663366 = 2 ⋅23831683.

It can be written as a sum of positive squares in only one way, i.e., 52461049 + 13875625 = 7243^2 + 3725^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66336679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16584167 + ... + 16584170.

Almost surely, 2^66336674 is an apocalyptic number.

66336674 is a deficient number, since it is larger than the sum of its proper divisors (33168340).

66336674 is a wasteful number, since it uses less digits than its factorization.

66336674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33168339.

The product of its digits is 326592, while the sum is 41.

The square root of 66336674 is about 8144.7328992423. The cubic root of 66336674 is about 404.8099987701.

The spelling of 66336674 in words is "sixty-six million, three hundred thirty-six thousand, six hundred seventy-four".