2566212061 has 4 divisors (see below), whose sum is σ = 2932813792. Its totient is φ = 2199610332.

The previous prime is 2566212049. The next prime is 2566212107. The reversal of 2566212061 is 1602126652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2566212061 - 2²¹ = 2564114909 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 (2566212041) 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, 183300855 + ... + 183300868.

It is an arithmetic number, because the mean of its divisors is an integer number (733203448).

Almost surely, 2^2566212061 is an apocalyptic number.

It is an amenable number.

2566212061 is a deficient number, since it is larger than the sum of its proper divisors (366601731).

2566212061 is an equidigital number, since it uses as much as digits as its factorization.

2566212061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366601730.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2566212061 is about 50657.7936846839. The cubic root of 2566212061 is about 1369.0863713347.

The spelling of 2566212061 in words is "two billion, five hundred sixty-six million, two hundred twelve thousand, sixty-one".