66396854 has 16 divisors (see below), whose sum is σ = 103109760. Its totient is φ = 32033280.

The previous prime is 66396851. The next prime is 66396877. The reversal of 66396854 is 45869366.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66396799 and 66396808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66396851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22742 + ... + 25494.

It is an arithmetic number, because the mean of its divisors is an integer number (6444360).

Almost surely, 2^66396854 is an apocalyptic number.

66396854 is a deficient number, since it is larger than the sum of its proper divisors (36712906).

66396854 is a wasteful number, since it uses less digits than its factorization.

66396854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175.

The product of its digits is 933120, while the sum is 47.

The square root of 66396854 is about 8148.4264738660. The cubic root of 66396854 is about 404.9323750322.

The spelling of 66396854 in words is "sixty-six million, three hundred ninety-six thousand, eight hundred fifty-four".