66526605 has 12 divisors (see below), whose sum is σ = 115312860. Its totient is φ = 35480832.

The previous prime is 66526601. The next prime is 66526613. The reversal of 66526605 is 50662566.

It can be written as a sum of positive squares in 2 ways, for example, as 8964036 + 57562569 = 2994^2 + 7587^2 .

It is not a de Polignac number, because 66526605 - 2² = 66526601 is a prime.

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 66526605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66526601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 739140 + ... + 739229.

It is an arithmetic number, because the mean of its divisors is an integer number (9609405).

Almost surely, 2^66526605 is an apocalyptic number.

It is an amenable number.

66526605 is a deficient number, since it is larger than the sum of its proper divisors (48786255).

66526605 is a wasteful number, since it uses less digits than its factorization.

66526605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478380 (or 1478377 counting only the distinct ones).

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

The square root of 66526605 is about 8156.3843092390. The cubic root of 66526605 is about 405.1959728293.

The spelling of 66526605 in words is "sixty-six million, five hundred twenty-six thousand, six hundred five".