63666195 has 16 divisors (see below), whose sum is σ = 102181632. Its totient is φ = 33850080.

The previous prime is 63666191. The next prime is 63666203. The reversal of 63666195 is 59166636.

It is not a de Polignac number, because 63666195 - 2² = 63666191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63666191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447 + ... + 11376.

It is an arithmetic number, because the mean of its divisors is an integer number (6386352).

Almost surely, 2^63666195 is an apocalyptic number.

63666195 is a deficient number, since it is larger than the sum of its proper divisors (38515437).

63666195 is a wasteful number, since it uses less digits than its factorization.

63666195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13162.

The product of its digits is 174960, while the sum is 42.

The square root of 63666195 is about 7979.1099127660. The cubic root of 63666195 is about 399.3033603540.

It can be divided in two parts, 636661 and 95, that added together give a triangular number (636756 = T₁₁₂₈).

The spelling of 63666195 in words is "sixty-three million, six hundred sixty-six thousand, one hundred ninety-five".