2665531897 has 8 divisors (see below), whose sum is σ = 3151368000. Its totient is φ = 2205957264.

The previous prime is 2665531877. The next prime is 2665531909. The reversal of 2665531897 is 7981355662.

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

It is not a de Polignac number, because 2665531897 - 2¹¹ = 2665529849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665531877) 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, 6565147 + ... + 6565552.

It is an arithmetic number, because the mean of its divisors is an integer number (393921000).

Almost surely, 2^2665531897 is an apocalyptic number.

It is an amenable number.

2665531897 is a deficient number, since it is larger than the sum of its proper divisors (485836103).

2665531897 is a wasteful number, since it uses less digits than its factorization.

2665531897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13130735.

The product of its digits is 2721600, while the sum is 52.

The square root of 2665531897 is about 51628.7894202450. The cubic root of 2665531897 is about 1386.5258194578.

The spelling of 2665531897 in words is "two billion, six hundred sixty-five million, five hundred thirty-one thousand, eight hundred ninety-seven".