2662661 has 2 divisors, whose sum is σ = 2662662. Its totient is φ = 2662660.

The previous prime is 2662657. The next prime is 2662669. The reversal of 2662661 is 1662662.

2662661 is nontrivially palindromic in base 11.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2660161 + 2500 = 1631^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 2662661 - 2² = 2662657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2662669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331330 + 1331331.

It is an arithmetic number, because the mean of its divisors is an integer number (1331331).

2^2662661 is an apocalyptic number.

It is an amenable number.

2662661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2662661 is an equidigital number, since it uses as much as digits as its factorization.

2662661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 2662661 is about 1631.7662210010. The cubic root of 2662661 is about 138.6027857211.

Subtracting from 2662661 its reverse (1662662), we obtain a palindrome (999999).

The spelling of 2662661 in words is "two million, six hundred sixty-two thousand, six hundred sixty-one".