2665021025 has 12 divisors (see below), whose sum is σ = 3374938752. Its totient is φ = 2086653840.

The previous prime is 2665020979. The next prime is 2665021027. The reversal of 2665021025 is 5201205662.

It is a de Polignac number, because none of the positive numbers 2^k-2665021025 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665021027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132877 + ... + 1135226.

It is an arithmetic number, because the mean of its divisors is an integer number (281244896).

Almost surely, 2^2665021025 is an apocalyptic number.

2665021025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2665021025 is a deficient number, since it is larger than the sum of its proper divisors (709917727).

2665021025 is a wasteful number, since it uses less digits than its factorization.

2665021025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268160 (or 2268155 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2665021025 is about 51623.8416334933. The cubic root of 2665021025 is about 1386.4372339517.

Adding to 2665021025 its reverse (5201205662), we get a palindrome (7866226687).

The spelling of 2665021025 in words is "two billion, six hundred sixty-five million, twenty-one thousand, twenty-five".