2665164125 has 32 divisors (see below), whose sum is σ = 3588775008. Its totient is φ = 1964390400.

The previous prime is 2665164121. The next prime is 2665164157. The reversal of 2665164125 is 5214615662.

It can be written as a sum of positive squares in 16 ways, for example, as 1913362564 + 751801561 = 43742^2 + 27419^2 .

It is not a de Polignac number, because 2665164125 - 2² = 2665164121 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665164121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1092407 + ... + 1094843.

It is an arithmetic number, because the mean of its divisors is an integer number (112149219).

Almost surely, 2^2665164125 is an apocalyptic number.

2665164125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2665164125 is a deficient number, since it is larger than the sum of its proper divisors (923610883).

2665164125 is a wasteful number, since it uses less digits than its factorization.

2665164125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138 (or 3128 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 2665164125 is about 51625.2276024038. The cubic root of 2665164125 is about 1386.4620487174.

Adding to 2665164125 its reverse (5214615662), we get a palindrome (7879779787).

The spelling of 2665164125 in words is "two billion, six hundred sixty-five million, one hundred sixty-four thousand, one hundred twenty-five".