2665947 has 8 divisors (see below), whose sum is σ = 3741760. Its totient is φ = 1683720.

The previous prime is 2665939. The next prime is 2665967. The reversal of 2665947 is 7495662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2665947 - 2³ = 2665939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665967) 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 7 ways as a sum of consecutive naturals, for example, 23329 + ... + 23442.

It is an arithmetic number, because the mean of its divisors is an integer number (467720).

2^2665947 is an apocalyptic number.

2665947 is a deficient number, since it is larger than the sum of its proper divisors (1075813).

2665947 is a wasteful number, since it uses less digits than its factorization.

2665947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46793.

The product of its digits is 90720, while the sum is 39.

The square root of 2665947 is about 1632.7727949718. The cubic root of 2665947 is about 138.6597790228.

The spelling of 2665947 in words is "two million, six hundred sixty-five thousand, nine hundred forty-seven".