2061666061 has 8 divisors (see below), whose sum is σ = 2537435264. Its totient is φ = 1631208240.

The previous prime is 2061666053. The next prime is 2061666077. The reversal of 2061666061 is 1606661602.

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 2061666061 - 2³ = 2061666053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061666031) 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, 11327745 + ... + 11327926.

It is an arithmetic number, because the mean of its divisors is an integer number (317179408).

Almost surely, 2^2061666061 is an apocalyptic number.

It is an amenable number.

2061666061 is a deficient number, since it is larger than the sum of its proper divisors (475769203).

2061666061 is a wasteful number, since it uses less digits than its factorization.

2061666061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22655691.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2061666061 is about 45405.5730169767. The cubic root of 2061666061 is about 1272.7392588839.

The spelling of 2061666061 in words is "two billion, sixty-one million, six hundred sixty-six thousand, sixty-one".