10666667061565 has 8 divisors (see below), whose sum is σ = 12800294872920. Its totient is φ = 8533137383232.

The previous prime is 10666667061433. The next prime is 10666667061613. The reversal of 10666667061565 is 56516076666601.

It can be written as a sum of positive squares in 4 ways, for example, as 45983655844 + 10620683405721 = 214438^2 + 3258939^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 10666667061565 - 2³³ = 10658077126973 is a prime.

It is a super-2 number, since 2×10666667061565² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 24293910 + ... + 24729079.

It is an arithmetic number, because the mean of its divisors is an integer number (1600036859115).

Almost surely, 2^{10666667061565} is an apocalyptic number.

It is an amenable number.

10666667061565 is a deficient number, since it is larger than the sum of its proper divisors (2133627811355).

10666667061565 is an equidigital number, since it uses as much as digits as its factorization.

10666667061565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49066511.

The product of its (nonzero) digits is 48988800, while the sum is 61.

The spelling of 10666667061565 in words is "ten trillion, six hundred sixty-six billion, six hundred sixty-seven million, sixty-one thousand, five hundred sixty-five".