2662406681 has 6 divisors (see below), whose sum is σ = 2926447146. Its totient is φ = 2420369600.

The previous prime is 2662406657. The next prime is 2662406689. The reversal of 2662406681 is 1866042662.

It can be written as a sum of positive squares in only one way, i.e., 1550784400 + 1111622281 = 39380^2 + 33341^2 .

It is not a de Polignac number, because 2662406681 - 2²² = 2658212377 is a prime.

It is a super-2 number, since 2×2662406681² = 14176818670066871522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2662406689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11001560 + ... + 11001801.

It is an arithmetic number, because the mean of its divisors is an integer number (487741191).

Almost surely, 2^2662406681 is an apocalyptic number.

It is an amenable number.

2662406681 is a deficient number, since it is larger than the sum of its proper divisors (264040465).

2662406681 is a wasteful number, since it uses less digits than its factorization.

2662406681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22003383 (or 22003372 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 2662406681 is about 51598.5143293874. The cubic root of 2662406681 is about 1385.9837278681.

The spelling of 2662406681 in words is "two billion, six hundred sixty-two million, four hundred six thousand, six hundred eighty-one".