66351199 has 2 divisors, whose sum is σ = 66351200. Its totient is φ = 66351198.

The previous prime is 66351179. The next prime is 66351203. The reversal of 66351199 is 99115366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66351199 - 2⁵ = 66351167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66351139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33175599 + 33175600.

It is an arithmetic number, because the mean of its divisors is an integer number (33175600).

Almost surely, 2^66351199 is an apocalyptic number.

66351199 is a deficient number, since it is larger than the sum of its proper divisors (1).

66351199 is an equidigital number, since it uses as much as digits as its factorization.

66351199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 40.

The square root of 66351199 is about 8145.6245309982. The cubic root of 66351199 is about 404.8395421874.

The spelling of 66351199 in words is "sixty-six million, three hundred fifty-one thousand, one hundred ninety-nine".