66174001 has 2 divisors, whose sum is σ = 66174002. Its totient is φ = 66174000.

The previous prime is 66173999. The next prime is 66174007. The reversal of 66174001 is 10047166.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65610000 + 564001 = 8100^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 66174001 - 2¹ = 66173999 is a prime.

Together with 66173999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66174007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33087000 + 33087001.

It is an arithmetic number, because the mean of its divisors is an integer number (33087001).

Almost surely, 2^66174001 is an apocalyptic number.

It is an amenable number.

66174001 is a deficient number, since it is larger than the sum of its proper divisors (1).

66174001 is an equidigital number, since it uses as much as digits as its factorization.

66174001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 66174001 is about 8134.7403769266. The cubic root of 66174001 is about 404.4788317384.

The spelling of 66174001 in words is "sixty-six million, one hundred seventy-four thousand, one".