2661899 has 2 divisors, whose sum is σ = 2661900. Its totient is φ = 2661898.

The previous prime is 2661871. The next prime is 2661917. The reversal of 2661899 is 9981662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661899 - 2⁸ = 2661643 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330949 + 1330950.

It is an arithmetic number, because the mean of its divisors is an integer number (1330950).

2^2661899 is an apocalyptic number.

2661899 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661899 is an equidigital number, since it uses as much as digits as its factorization.

2661899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 2661899 is about 1631.5327149647. The cubic root of 2661899 is about 138.5895626835.

The spelling of 2661899 in words is "two million, six hundred sixty-one thousand, eight hundred ninety-nine".