2664487 has 4 divisors (see below), whose sum is σ = 3045136. Its totient is φ = 2283840.

The previous prime is 2664479. The next prime is 2664511. The reversal of 2664487 is 7844662.

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 2664487 - 2³ = 2664479 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁷ + 6⁸ + 4⁸ + 4⁸ + 8⁵ + 7⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664187) 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, 190314 + ... + 190327.

It is an arithmetic number, because the mean of its divisors is an integer number (761284).

2^2664487 is an apocalyptic number.

2664487 is a deficient number, since it is larger than the sum of its proper divisors (380649).

2664487 is an equidigital number, since it uses as much as digits as its factorization.

2664487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380648.

The product of its digits is 64512, while the sum is 37.

The square root of 2664487 is about 1632.3256415311. The cubic root of 2664487 is about 138.6344621599.

It can be divided in two parts, 266 and 4487, that added together give a triangular number (4753 = T₉₇).

The spelling of 2664487 in words is "two million, six hundred sixty-four thousand, four hundred eighty-seven".