66476897 has 2 divisors, whose sum is σ = 66476898. Its totient is φ = 66476896.

The previous prime is 66476873. The next prime is 66476899. The reversal of 66476897 is 79867466.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 5387041 = 7816^2 + 2321^2 .

It is a cyclic number.

It is not a de Polignac number, because 66476897 - 2⁶ = 66476833 is a prime.

Together with 66476899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66476899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33238448 + 33238449.

It is an arithmetic number, because the mean of its divisors is an integer number (33238449).

Almost surely, 2^66476897 is an apocalyptic number.

It is an amenable number.

66476897 is a deficient number, since it is larger than the sum of its proper divisors (1).

66476897 is an equidigital number, since it uses as much as digits as its factorization.

66476897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 66476897 is about 8153.3365562817. The cubic root of 66476897 is about 405.0950282523.

The spelling of 66476897 in words is "sixty-six million, four hundred seventy-six thousand, eight hundred ninety-seven".