5265666 has 72 divisors (see below), whose sum is σ = 13802880. Its totient is φ = 1420848.

The previous prime is 5265653. The next prime is 5265683. The reversal of 5265666 is 6665625.

5265666 = T₁₇₁ + T₁₇₂ + ... + T₃₃₁.

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 5265666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66615 + ... + 66693.

Almost surely, 2^5265666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5265666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6901440).

5265666 is an abundant number, since it is smaller than the sum of its proper divisors (8537214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5265666 is a wasteful number, since it uses less digits than its factorization.

5265666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 114 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 5265666 is about 2294.7039024676. The cubic root of 5265666 is about 173.9740349682.

The spelling of 5265666 in words is "five million, two hundred sixty-five thousand, six hundred sixty-six".