66713401 has 2 divisors, whose sum is σ = 66713402. Its totient is φ = 66713400.

The previous prime is 66713371. The next prime is 66713407. The reversal of 66713401 is 10431766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65999376 + 714025 = 8124^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 66713401 - 2⁹ = 66712889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66713401.

It is not a weakly prime, because it can be changed into another prime (66713407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33356700 + 33356701.

It is an arithmetic number, because the mean of its divisors is an integer number (33356701).

Almost surely, 2^66713401 is an apocalyptic number.

It is an amenable number.

66713401 is a deficient number, since it is larger than the sum of its proper divisors (1).

66713401 is an equidigital number, since it uses as much as digits as its factorization.

66713401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 66713401 is about 8167.8271896509. The cubic root of 66713401 is about 405.5748601251.

The spelling of 66713401 in words is "sixty-six million, seven hundred thirteen thousand, four hundred one".