2660287 has 4 divisors (see below), whose sum is σ = 3040336. Its totient is φ = 2280240.

The previous prime is 2660237. The next prime is 2660291. The reversal of 2660287 is 7820662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2660287 - 2¹⁵ = 2627519 is a prime.

It is a Duffinian number.

2660287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660237) 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, 190014 + ... + 190027.

It is an arithmetic number, because the mean of its divisors is an integer number (760084).

2^2660287 is an apocalyptic number.

2660287 is a deficient number, since it is larger than the sum of its proper divisors (380049).

2660287 is an equidigital number, since it uses as much as digits as its factorization.

2660287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380048.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2660287 is about 1631.0386261521. The cubic root of 2660287 is about 138.5615812203.

The spelling of 2660287 in words is "two million, six hundred sixty thousand, two hundred eighty-seven".