2664987 has 16 divisors (see below), whose sum is σ = 3994368. Its totient is φ = 1568160.

The previous prime is 2664967. The next prime is 2664989. The reversal of 2664987 is 7894662.

It is not a de Polignac number, because 2664987 - 2⁶ = 2664923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2664989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589 + ... + 2382.

It is an arithmetic number, because the mean of its divisors is an integer number (249648).

2^2664987 is an apocalyptic number.

2664987 is a deficient number, since it is larger than the sum of its proper divisors (1329381).

2664987 is a wasteful number, since it uses less digits than its factorization.

2664987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010.

The product of its digits is 145152, while the sum is 42.

The square root of 2664987 is about 1632.4787900613. The cubic root of 2664987 is about 138.6431333595.

It can be divided in two parts, 266 and 4987, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 2664987 in words is "two million, six hundred sixty-four thousand, nine hundred eighty-seven".