63906065 has 8 divisors (see below), whose sum is σ = 77176680. Its totient is φ = 50798592.

The previous prime is 63906049. The next prime is 63906079. The reversal of 63906065 is 56060936.

It can be written as a sum of positive squares in 4 ways, for example, as 1290496 + 62615569 = 1136^2 + 7913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63906065 - 2⁴ = 63906049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39920 + ... + 41489.

It is an arithmetic number, because the mean of its divisors is an integer number (9647085).

Almost surely, 2^63906065 is an apocalyptic number.

It is an amenable number.

63906065 is a deficient number, since it is larger than the sum of its proper divisors (13270615).

63906065 is a wasteful number, since it uses less digits than its factorization.

63906065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81571.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 63906065 is about 7994.1269066734. The cubic root of 63906065 is about 399.8042062610.

The spelling of 63906065 in words is "sixty-three million, nine hundred six thousand, sixty-five".