2666025 has 54 divisors (see below), whose sum is σ = 5196282. Its totient is φ = 1305600.

The previous prime is 2666021. The next prime is 2666029. The reversal of 2666025 is 5206662.

It is an interprime number because it is at equal distance from previous prime (2666021) and next prime (2666029).

It can be written as a sum of positive squares in 9 ways, for example, as 660969 + 2005056 = 813^2 + 1416^2 .

It is not a de Polignac number, because 2666025 - 2² = 2666021 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2666025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666021) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 65005 + ... + 65045.

2^2666025 is an apocalyptic number.

2666025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2666025 is a deficient number, since it is larger than the sum of its proper divisors (2530257).

2666025 is a wasteful number, since it uses less digits than its factorization.

2666025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2666025 is about 1632.7966805454. The cubic root of 2666025 is about 138.6611313074.

The spelling of 2666025 in words is "two million, six hundred sixty-six thousand, twenty-five".