63556666723 has 16 divisors (see below), whose sum is σ = 72365765472. Its totient is φ = 55305952000.

The previous prime is 63556666721. The next prime is 63556666727. The reversal of 63556666723 is 32766665536.

It is a happy number.

63556666723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 63556666723 - 2¹ = 63556666721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63556666721) 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, 1305568 + ... + 1353373.

It is an arithmetic number, because the mean of its divisors is an integer number (4522860342).

Almost surely, 2^63556666723 is an apocalyptic number.

63556666723 is a deficient number, since it is larger than the sum of its proper divisors (8809098749).

63556666723 is a wasteful number, since it uses less digits than its factorization.

63556666723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659046.

The product of its digits is 24494400, while the sum is 55.

The spelling of 63556666723 in words is "sixty-three billion, five hundred fifty-six million, six hundred sixty-six thousand, seven hundred twenty-three".