2666949 has 4 divisors (see below), whose sum is σ = 3555936. Its totient is φ = 1777964.

The previous prime is 2666947. The next prime is 2666953. The reversal of 2666949 is 9496662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2666949 - 2¹ = 2666947 is a prime.

It is a super-2 number, since 2×2666949² = 14225233937202, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2666949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444489 + ... + 444494.

It is an arithmetic number, because the mean of its divisors is an integer number (888984).

2^2666949 is an apocalyptic number.

It is an amenable number.

2666949 is a deficient number, since it is larger than the sum of its proper divisors (888987).

2666949 is an equidigital number, since it uses as much as digits as its factorization.

2666949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888986.

The product of its digits is 139968, while the sum is 42.

The square root of 2666949 is about 1633.0796061429. The cubic root of 2666949 is about 138.6771486724.

The spelling of 2666949 in words is "two million, six hundred sixty-six thousand, nine hundred forty-nine".