66425206 has 4 divisors (see below), whose sum is σ = 99637812. Its totient is φ = 33212602.

The previous prime is 66425201. The next prime is 66425267. The reversal of 66425206 is 60252466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66425201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16606300 + ... + 16606303.

It is an arithmetic number, because the mean of its divisors is an integer number (24909453).

Almost surely, 2^66425206 is an apocalyptic number.

66425206 is a deficient number, since it is larger than the sum of its proper divisors (33212606).

66425206 is a wasteful number, since it uses less digits than its factorization.

66425206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33212605.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 66425206 is about 8150.1660105792. The cubic root of 66425206 is about 404.9900033096.

The spelling of 66425206 in words is "sixty-six million, four hundred twenty-five thousand, two hundred six".