10663220865 has 16 divisors (see below), whose sum is σ = 18612167616. Its totient is φ = 5170046400.

The previous prime is 10663220861. The next prime is 10663220881. The reversal of 10663220865 is 56802236601.

It is not a de Polignac number, because 10663220865 - 2² = 10663220861 is a prime.

It is a super-2 number, since 2×10663220865² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10663220861) 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, 32312626 + ... + 32312955.

It is an arithmetic number, because the mean of its divisors is an integer number (1163260476).

Almost surely, 2^10663220865 is an apocalyptic number.

10663220865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10663220865 is a deficient number, since it is larger than the sum of its proper divisors (7948946751).

10663220865 is a wasteful number, since it uses less digits than its factorization.

10663220865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64625600.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 10663220865 in words is "ten billion, six hundred sixty-three million, two hundred twenty thousand, eight hundred sixty-five".