97666447 has 2 divisors, whose sum is σ = 97666448. Its totient is φ = 97666446.

The previous prime is 97666427. The next prime is 97666451. The reversal of 97666447 is 74466679.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97666447 - 2⁷ = 97666319 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97666447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97666427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48833223 + 48833224.

It is an arithmetic number, because the mean of its divisors is an integer number (48833224).

Almost surely, 2^97666447 is an apocalyptic number.

97666447 is a deficient number, since it is larger than the sum of its proper divisors (1).

97666447 is an equidigital number, since it uses as much as digits as its factorization.

97666447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 49.

The square root of 97666447 is about 9882.6336064836. The cubic root of 97666447 is about 460.5199649617.

The spelling of 97666447 in words is "ninety-seven million, six hundred sixty-six thousand, four hundred forty-seven".