66957097 has 2 divisors, whose sum is σ = 66957098. Its totient is φ = 66957096.

The previous prime is 66957061. The next prime is 66957109. The reversal of 66957097 is 79075966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65755881 + 1201216 = 8109^2 + 1096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66957097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66957097.

It is not a weakly prime, because it can be changed into another prime (66957017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33478548 + 33478549.

It is an arithmetic number, because the mean of its divisors is an integer number (33478549).

Almost surely, 2^66957097 is an apocalyptic number.

It is an amenable number.

66957097 is a deficient number, since it is larger than the sum of its proper divisors (1).

66957097 is an equidigital number, since it uses as much as digits as its factorization.

66957097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 66957097 is about 8182.7316343627. The cubic root of 66957097 is about 406.0680986987.

The spelling of 66957097 in words is "sixty-six million, nine hundred fifty-seven thousand, ninety-seven".