66432697 has 2 divisors, whose sum is σ = 66432698. Its totient is φ = 66432696.

The previous prime is 66432689. The next prime is 66432703. The reversal of 66432697 is 79623466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66275881 + 156816 = 8141^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 66432697 - 2³ = 66432689 is a prime.

It is not a weakly prime, because it can be changed into another prime (66432637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33216348 + 33216349.

It is an arithmetic number, because the mean of its divisors is an integer number (33216349).

Almost surely, 2^66432697 is an apocalyptic number.

It is an amenable number.

66432697 is a deficient number, since it is larger than the sum of its proper divisors (1).

66432697 is an equidigital number, since it uses as much as digits as its factorization.

66432697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 66432697 is about 8150.6255588145. The cubic root of 66432697 is about 405.0052267780.

The spelling of 66432697 in words is "sixty-six million, four hundred thirty-two thousand, six hundred ninety-seven".