10663540665 has 8 divisors (see below), whose sum is σ = 17061665088. Its totient is φ = 5687221680.

The previous prime is 10663540651. The next prime is 10663540703. The reversal of 10663540665 is 56604536601.

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

It is not a de Polignac number, because 10663540665 - 2⁸ = 10663540409 is a prime.

It is a super-2 number, since 2×10663540665² (a number of 21 digits) contains 22 as substring.

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, 355451341 + ... + 355451370.

It is an arithmetic number, because the mean of its divisors is an integer number (2132708136).

Almost surely, 2^10663540665 is an apocalyptic number.

10663540665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10663540665 is a deficient number, since it is larger than the sum of its proper divisors (6398124423).

10663540665 is an equidigital number, since it uses as much as digits as its factorization.

10663540665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710902719.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 10663540665 in words is "ten billion, six hundred sixty-three million, five hundred forty thousand, six hundred sixty-five".