10511565666 has 16 divisors (see below), whose sum is σ = 24026435904. Its totient is φ = 3003304464.

The previous prime is 10511565661. The next prime is 10511565671. The reversal of 10511565666 is 66656511501.

It is an interprime number because it is at equal distance from previous prime (10511565661) and next prime (10511565671).

It is a super-2 number, since 2×10511565666² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 250275373 = 10511565666 / (1 + 0 + 5 + 1 + 1 + 5 + 6 + 5 + 6 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (10511565661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125137645 + ... + 125137728.

It is an arithmetic number, because the mean of its divisors is an integer number (1501652244).

Almost surely, 2^10511565666 is an apocalyptic number.

10511565666 is an abundant number, since it is smaller than the sum of its proper divisors (13514870238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10511565666 is a wasteful number, since it uses less digits than its factorization.

10511565666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250275385.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 10511565666 in words is "ten billion, five hundred eleven million, five hundred sixty-five thousand, six hundred sixty-six".