2666440025 has 12 divisors (see below), whose sum is σ = 3450142272. Its totient is φ = 2040405840.

The previous prime is 2666440013. The next prime is 2666440037. The reversal of 2666440025 is 5200446662.

It is an interprime number because it is at equal distance from previous prime (2666440013) and next prime (2666440037).

It is not a de Polignac number, because 2666440025 - 2²² = 2662245721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2318069 + ... + 2319218.

It is an arithmetic number, because the mean of its divisors is an integer number (287511856).

Almost surely, 2^2666440025 is an apocalyptic number.

2666440025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2666440025 is a deficient number, since it is larger than the sum of its proper divisors (783702247).

2666440025 is a wasteful number, since it uses less digits than its factorization.

2666440025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637320 (or 4637315 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 2666440025 is about 51637.5834543020. The cubic root of 2666440025 is about 1386.6832614495.

Adding to 2666440025 its reverse (5200446662), we get a palindrome (7866886687).

The spelling of 2666440025 in words is "two billion, six hundred sixty-six million, four hundred forty thousand, twenty-five".