66652601 has 2 divisors, whose sum is σ = 66652602. Its totient is φ = 66652600.

The previous prime is 66652591. The next prime is 66652613. The reversal of 66652601 is 10625666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47955625 + 18696976 = 6925^2 + 4324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66652601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66652661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33326300 + 33326301.

It is an arithmetic number, because the mean of its divisors is an integer number (33326301).

Almost surely, 2^66652601 is an apocalyptic number.

It is an amenable number.

66652601 is a deficient number, since it is larger than the sum of its proper divisors (1).

66652601 is an equidigital number, since it uses as much as digits as its factorization.

66652601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66652601 is about 8164.1044211842. The cubic root of 66652601 is about 405.4516142905.

The spelling of 66652601 in words is "sixty-six million, six hundred fifty-two thousand, six hundred one".