66026261 has 16 divisors (see below), whose sum is σ = 79014144. Its totient is φ = 53944704.

The previous prime is 66026231. The next prime is 66026267. The reversal of 66026261 is 16262066.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66026261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66026267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63401 + ... + 64433.

It is an arithmetic number, because the mean of its divisors is an integer number (4938384).

Almost surely, 2^66026261 is an apocalyptic number.

It is an amenable number.

66026261 is a deficient number, since it is larger than the sum of its proper divisors (12987883).

66026261 is a wasteful number, since it uses less digits than its factorization.

66026261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 66026261 is about 8125.6544967159. The cubic root of 66026261 is about 404.1775944519.

The spelling of 66026261 in words is "sixty-six million, twenty-six thousand, two hundred sixty-one".