66170601 has 28 divisors (see below), whose sum is σ = 113392192. Its totient is φ = 37808856.

The previous prime is 66170581. The next prime is 66170617. The reversal of 66170601 is 10607166.

It is not a de Polignac number, because 66170601 - 2⁵ = 66170569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66170641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1381 + ... + 11586.

Almost surely, 2^66170601 is an apocalyptic number.

It is an amenable number.

66170601 is a deficient number, since it is larger than the sum of its proper divisors (47221591).

66170601 is an equidigital number, since it uses as much as digits as its factorization.

66170601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992 (or 12977 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 66170601 is about 8134.5313940017. The cubic root of 66170601 is about 404.4719042868.

Adding to 66170601 its reverse (10607166), we get a palindrome (76777767).

The spelling of 66170601 in words is "sixty-six million, one hundred seventy thousand, six hundred one".