66214806 has 16 divisors (see below), whose sum is σ = 151348224. Its totient is φ = 18918504.

The previous prime is 66214783. The next prime is 66214817. The reversal of 66214806 is 60841266.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788230 + ... + 788313.

It is an arithmetic number, because the mean of its divisors is an integer number (9459264).

Almost surely, 2^66214806 is an apocalyptic number.

66214806 is an abundant number, since it is smaller than the sum of its proper divisors (85133418).

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

66214806 is a wasteful number, since it uses less digits than its factorization.

66214806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576555.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 66214806 is about 8137.2480606161. The cubic root of 66214806 is about 404.5619528393.

The spelling of 66214806 in words is "sixty-six million, two hundred fourteen thousand, eight hundred six".