66266461 has 2 divisors, whose sum is σ = 66266462. Its totient is φ = 66266460.

The previous prime is 66266429. The next prime is 66266467. The reversal of 66266461 is 16466266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58813561 + 7452900 = 7669^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 66266461 - 2⁵ = 66266429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66266461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66266467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33133230 + 33133231.

It is an arithmetic number, because the mean of its divisors is an integer number (33133231).

Almost surely, 2^66266461 is an apocalyptic number.

It is an amenable number.

66266461 is a deficient number, since it is larger than the sum of its proper divisors (1).

66266461 is an equidigital number, since it uses as much as digits as its factorization.

66266461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 66266461 is about 8140.4214264373. The cubic root of 66266461 is about 404.6671267781.

The spelling of 66266461 in words is "sixty-six million, two hundred sixty-six thousand, four hundred sixty-one".