10665111515551 has 8 divisors (see below), whose sum is σ = 10938944170224. Its totient is φ = 10391931622080.

The previous prime is 10665111515543. The next prime is 10665111515567. The reversal of 10665111515551 is 15551511156601.

It is a happy number.

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

It is not a de Polignac number, because 10665111515551 - 2³ = 10665111515543 is a prime.

It is a super-2 number, since 2×10665111515551² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10665111515498 and 10665111515507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10665111515951) 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, 163157205 + ... + 163222558.

It is an arithmetic number, because the mean of its divisors is an integer number (1367368021278).

Almost surely, 2^{10665111515551} is an apocalyptic number.

10665111515551 is a deficient number, since it is larger than the sum of its proper divisors (273832654673).

10665111515551 is an equidigital number, since it uses as much as digits as its factorization.

10665111515551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326380601.

The product of its (nonzero) digits is 112500, while the sum is 43.

The spelling of 10665111515551 in words is "ten trillion, six hundred sixty-five billion, one hundred eleven million, five hundred fifteen thousand, five hundred fifty-one".