66428174 has 4 divisors (see below), whose sum is σ = 99642264. Its totient is φ = 33214086.

The previous prime is 66428147. The next prime is 66428189. The reversal of 66428174 is 47182466.

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, 16607042 + ... + 16607045.

It is an arithmetic number, because the mean of its divisors is an integer number (24910566).

Almost surely, 2^66428174 is an apocalyptic number.

66428174 is a deficient number, since it is larger than the sum of its proper divisors (33214090).

66428174 is a wasteful number, since it uses less digits than its factorization.

66428174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33214089.

The product of its digits is 64512, while the sum is 38.

The square root of 66428174 is about 8150.3480907259. The cubic root of 66428174 is about 404.9960351184.

The spelling of 66428174 in words is "sixty-six million, four hundred twenty-eight thousand, one hundred seventy-four".