2056662065165 has 4 divisors (see below), whose sum is σ = 2467994478204. Its totient is φ = 1645329652128.

The previous prime is 2056662065123. The next prime is 2056662065167. The reversal of 2056662065165 is 5615602666502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 772660338121 + 1284001727044 = 879011^2 + 1133138^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056662065165 - 2¹⁶ = 2056661999629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056662065167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205666206512 + ... + 205666206521.

It is an arithmetic number, because the mean of its divisors is an integer number (616998619551).

Almost surely, 2^{2056662065165} is an apocalyptic number.

It is an amenable number.

2056662065165 is a deficient number, since it is larger than the sum of its proper divisors (411332413039).

2056662065165 is an equidigital number, since it uses as much as digits as its factorization.

2056662065165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411332413038.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 2056662065165 in words is "two trillion, fifty-six billion, six hundred sixty-two million, sixty-five thousand, one hundred sixty-five".