66475597 has 2 divisors, whose sum is σ = 66475598. Its totient is φ = 66475596.

The previous prime is 66475583. The next prime is 66475601. The reversal of 66475597 is 79557466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41615401 + 24860196 = 6451^2 + 4986^2 .

It is a cyclic number.

It is not a de Polignac number, because 66475597 - 2⁷ = 66475469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66475597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66475517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33237798 + 33237799.

It is an arithmetic number, because the mean of its divisors is an integer number (33237799).

Almost surely, 2^66475597 is an apocalyptic number.

It is an amenable number.

66475597 is a deficient number, since it is larger than the sum of its proper divisors (1).

66475597 is an equidigital number, since it uses as much as digits as its factorization.

66475597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 49.

The square root of 66475597 is about 8153.2568339284. The cubic root of 66475597 is about 405.0923876007.

The spelling of 66475597 in words is "sixty-six million, four hundred seventy-five thousand, five hundred ninety-seven".