2665397 has 8 divisors (see below), whose sum is σ = 3056256. Its totient is φ = 2277072.

The previous prime is 2665391. The next prime is 2665409. The reversal of 2665397 is 7935662.

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

It is not a de Polignac number, because 2665397 - 2²⁰ = 1616821 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2665397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3143 + ... + 3899.

It is an arithmetic number, because the mean of its divisors is an integer number (382032).

2^2665397 is an apocalyptic number.

It is an amenable number.

2665397 is a deficient number, since it is larger than the sum of its proper divisors (390859).

2665397 is an equidigital number, since it uses as much as digits as its factorization.

2665397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267.

The product of its digits is 68040, while the sum is 38.

The square root of 2665397 is about 1632.6043611359. The cubic root of 2665397 is about 138.6502429338.

The spelling of 2665397 in words is "two million, six hundred sixty-five thousand, three hundred ninety-seven".