66356001 has 12 divisors (see below), whose sum is σ = 95951700. Its totient is φ = 44189280.

The previous prime is 66355979. The next prime is 66356011. The reversal of 66356001 is 10065366.

It can be written as a sum of positive squares in 2 ways, for example, as 51494976 + 14861025 = 7176^2 + 3855^2 .

It is not a de Polignac number, because 66356001 - 2⁶ = 66355937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66356011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6075 + ... + 13023.

It is an arithmetic number, because the mean of its divisors is an integer number (7995975).

Almost surely, 2^66356001 is an apocalyptic number.

It is an amenable number.

66356001 is a deficient number, since it is larger than the sum of its proper divisors (29595699).

66356001 is a wasteful number, since it uses less digits than its factorization.

66356001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016 (or 8013 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 66356001 is about 8145.9192851390. The cubic root of 66356001 is about 404.8493083640.

The spelling of 66356001 in words is "sixty-six million, three hundred fifty-six thousand, one".