66522616 has 8 divisors (see below), whose sum is σ = 124729920. Its totient is φ = 33261304.

The previous prime is 66522611. The next prime is 66522619. The reversal of 66522616 is 61622566.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66522611) 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 as a sum of consecutive naturals, namely, 4157656 + ... + 4157671.

It is an arithmetic number, because the mean of its divisors is an integer number (15591240).

Almost surely, 2^66522616 is an apocalyptic number.

It is an amenable number.

66522616 is a deficient number, since it is larger than the sum of its proper divisors (58207304).

66522616 is a wasteful number, since it uses less digits than its factorization.

66522616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8315333 (or 8315329 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 66522616 is about 8156.1397732015. The cubic root of 66522616 is about 405.1878740191.

The spelling of 66522616 in words is "sixty-six million, five hundred twenty-two thousand, six hundred sixteen".