2861166505707 has 36 divisors (see below), whose sum is σ = 4255143657960. Its totient is φ = 1900102356072.

The previous prime is 2861166505693. The next prime is 2861166505709. The reversal of 2861166505707 is 7075056611682.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

2861166505707 is a `hidden beast` number, since 2 + 8 + 6 + 1 + 1 + 6 + 65 + 0 + 570 + 7 = 666.

2861166505707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2861166505707 - 2³⁰ = 2860092763883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2861166505709) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3225666418 + ... + 3225667304.

Almost surely, 2^{2861166505707} is an apocalyptic number.

2861166505707 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2861166505707 is a deficient number, since it is larger than the sum of its proper divisors (1393977152253).

2861166505707 is an frugal number, since it uses more digits than its factorization.

2861166505707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 2861166505707 in words is "two trillion, eight hundred sixty-one billion, one hundred sixty-six million, five hundred five thousand, seven hundred seven".