2661867 has 12 divisors (see below), whose sum is σ = 4140864. Its totient is φ = 1638000.

The previous prime is 2661863. The next prime is 2661871. The reversal of 2661867 is 7681662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2661863) and next prime (2661871).

It is not a de Polignac number, because 2661867 - 2² = 2661863 is a prime.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2661863) 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 11 ways as a sum of consecutive naturals, for example, 11259 + ... + 11492.

It is an arithmetic number, because the mean of its divisors is an integer number (345072).

2^2661867 is an apocalyptic number.

2661867 is a deficient number, since it is larger than the sum of its proper divisors (1478997).

2661867 is a wasteful number, since it uses less digits than its factorization.

2661867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22770 (or 22767 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 2661867 is about 1631.5229082057. The cubic root of 2661867 is about 138.5890073302.

The spelling of 2661867 in words is "two million, six hundred sixty-one thousand, eight hundred sixty-seven".