66225806 has 4 divisors (see below), whose sum is σ = 99338712. Its totient is φ = 33112902.

The previous prime is 66225793. The next prime is 66225833. The reversal of 66225806 is 60852266.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16556450 + ... + 16556453.

It is an arithmetic number, because the mean of its divisors is an integer number (24834678).

Almost surely, 2^66225806 is an apocalyptic number.

66225806 is a deficient number, since it is larger than the sum of its proper divisors (33112906).

66225806 is a wasteful number, since it uses less digits than its factorization.

66225806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33112905.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 66225806 is about 8137.9239367298. The cubic root of 66225806 is about 404.5843543501.

The spelling of 66225806 in words is "sixty-six million, two hundred twenty-five thousand, eight hundred six".