647266055663 has 4 divisors (see below), whose sum is σ = 649221542568. Its totient is φ = 645310568760.

The previous prime is 647266055641. The next prime is 647266055677. The reversal of 647266055663 is 366550662746.

647266055663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 647266055663 - 2²⁸ = 646997620207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647266055599 and 647266055608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647266057663) 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, 977742956 + ... + 977743617.

It is an arithmetic number, because the mean of its divisors is an integer number (162305385642).

Almost surely, 2^647266055663 is an apocalyptic number.

647266055663 is a deficient number, since it is larger than the sum of its proper divisors (1955486905).

647266055663 is a wasteful number, since it uses less digits than its factorization.

647266055663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955486904.

The product of its (nonzero) digits is 32659200, while the sum is 56.

The spelling of 647266055663 in words is "six hundred forty-seven billion, two hundred sixty-six million, fifty-five thousand, six hundred sixty-three".