63966723 has 4 divisors (see below), whose sum is σ = 85288968. Its totient is φ = 42644480.

The previous prime is 63966659. The next prime is 63966731. The reversal of 63966723 is 32766936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63966723 - 2⁶ = 63966659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63966823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10661118 + ... + 10661123.

It is an arithmetic number, because the mean of its divisors is an integer number (21322242).

Almost surely, 2^63966723 is an apocalyptic number.

63966723 is a deficient number, since it is larger than the sum of its proper divisors (21322245).

63966723 is a wasteful number, since it uses less digits than its factorization.

63966723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21322244.

The product of its digits is 244944, while the sum is 42.

The square root of 63966723 is about 7997.9199170784. The cubic root of 63966723 is about 399.9306608976.

The spelling of 63966723 in words is "sixty-three million, nine hundred sixty-six thousand, seven hundred twenty-three".