2665291389 has 8 divisors (see below), whose sum is σ = 3561638400. Its totient is φ = 1772902656.

The previous prime is 2665291381. The next prime is 2665291397. The reversal of 2665291389 is 9831925662.

It is an interprime number because it is at equal distance from previous prime (2665291381) and next prime (2665291397).

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

It is not a de Polignac number, because 2665291389 - 2³ = 2665291381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665291381) 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, 987997 + ... + 990690.

It is an arithmetic number, because the mean of its divisors is an integer number (445204800).

Almost surely, 2^2665291389 is an apocalyptic number.

It is an amenable number.

2665291389 is a deficient number, since it is larger than the sum of its proper divisors (896347011).

2665291389 is a wasteful number, since it uses less digits than its factorization.

2665291389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979139.

The product of its digits is 1399680, while the sum is 51.

The square root of 2665291389 is about 51626.4601633697. The cubic root of 2665291389 is about 1386.4841166389.

The spelling of 2665291389 in words is "two billion, six hundred sixty-five million, two hundred ninety-one thousand, three hundred eighty-nine".