66526349 has 2 divisors, whose sum is σ = 66526350. Its totient is φ = 66526348.

The previous prime is 66526307. The next prime is 66526357. The reversal of 66526349 is 94362566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59182249 + 7344100 = 7693^2 + 2710^2 .

It is a cyclic number.

It is not a de Polignac number, because 66526349 - 2¹⁶ = 66460813 is a prime.

It is a super-2 number, since 2×66526349² = 8851510222539602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66526379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33263174 + 33263175.

It is an arithmetic number, because the mean of its divisors is an integer number (33263175).

Almost surely, 2^66526349 is an apocalyptic number.

It is an amenable number.

66526349 is a deficient number, since it is larger than the sum of its proper divisors (1).

66526349 is an equidigital number, since it uses as much as digits as its factorization.

66526349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The square root of 66526349 is about 8156.3686159957. The cubic root of 66526349 is about 405.1954530858.

The spelling of 66526349 in words is "sixty-six million, five hundred twenty-six thousand, three hundred forty-nine".