2061166585 has 8 divisors (see below), whose sum is σ = 2540248776. Its totient is φ = 1604367360.

The previous prime is 2061166571. The next prime is 2061166609. The reversal of 2061166585 is 5856611602.

It can be written as a sum of positive squares in 4 ways, for example, as 313006864 + 1748159721 = 17692^2 + 41811^2 .

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

It is not a de Polignac number, because 2061166585 - 2⁹ = 2061166073 is a prime.

It is a super-2 number, since 2×2061166585² = 8496815382241124450, which contains 22 as substring.

It is a Duffinian 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, 5570536 + ... + 5570905.

It is an arithmetic number, because the mean of its divisors is an integer number (317531097).

Almost surely, 2^2061166585 is an apocalyptic number.

It is an amenable number.

2061166585 is a deficient number, since it is larger than the sum of its proper divisors (479082191).

2061166585 is a wasteful number, since it uses less digits than its factorization.

2061166585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141483.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 2061166585 is about 45400.0725219685. The cubic root of 2061166585 is about 1272.6364691919.

The spelling of 2061166585 in words is "two billion, sixty-one million, one hundred sixty-six thousand, five hundred eighty-five".