2661406011 has 24 divisors (see below), whose sum is σ = 4333852880. Its totient is φ = 1612971360.

The previous prime is 2661405983. The next prime is 2661406051. The reversal of 2661406011 is 1106041662.

It is not a de Polignac number, because 2661406011 - 2⁷ = 2661405883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661406051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404050 + ... + 410583.

Almost surely, 2^2661406011 is an apocalyptic number.

2661406011 is a deficient number, since it is larger than the sum of its proper divisors (1672446869).

2661406011 is a wasteful number, since it uses less digits than its factorization.

2661406011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814664 (or 814647 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2661406011 is about 51588.8167241700. The cubic root of 2661406011 is about 1385.8100646757.

Adding to 2661406011 its reverse (1106041662), we get a palindrome (3767447673).

The spelling of 2661406011 in words is "two billion, six hundred sixty-one million, four hundred six thousand, eleven".