2660091 has 16 divisors (see below), whose sum is σ = 4080384. Its totient is φ = 1509984.

The previous prime is 2660089. The next prime is 2660107. The reversal of 2660091 is 1900662.

It is not a de Polignac number, because 2660091 - 2¹ = 2660089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2660011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3816 + ... + 4458.

It is an arithmetic number, because the mean of its divisors is an integer number (255024).

2^2660091 is an apocalyptic number.

2660091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2660091 is a deficient number, since it is larger than the sum of its proper divisors (1420293).

2660091 is a wasteful number, since it uses less digits than its factorization.

2660091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2660091 is about 1630.9785406314. The cubic root of 2660091 is about 138.5581782370.

The spelling of 2660091 in words is "two million, six hundred sixty thousand, ninety-one".