66170428 has 6 divisors (see below), whose sum is σ = 115798256. Its totient is φ = 33085212.

The previous prime is 66170417. The next prime is 66170441. The reversal of 66170428 is 82407166.

It is a junction number, because it is equal to n+sod(n) for n = 66170393 and 66170402.

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, 8271300 + ... + 8271307.

Almost surely, 2^66170428 is an apocalyptic number.

It is an amenable number.

66170428 is a deficient number, since it is larger than the sum of its proper divisors (49627828).

66170428 is a wasteful number, since it uses less digits than its factorization.

66170428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16542611 (or 16542609 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 66170428 is about 8134.5207603153. The cubic root of 66170428 is about 404.4715517954.

The spelling of 66170428 in words is "sixty-six million, one hundred seventy thousand, four hundred twenty-eight".