66626530 has 16 divisors (see below), whose sum is σ = 120559104. Its totient is φ = 26510320.

The previous prime is 66626513. The next prime is 66626531. The reversal of 66626530 is 3562666.

It is not an unprimeable number, because it can be changed into a prime (66626531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15532 + ... + 19351.

It is an arithmetic number, because the mean of its divisors is an integer number (7534944).

Almost surely, 2^66626530 is an apocalyptic number.

66626530 is a deficient number, since it is larger than the sum of its proper divisors (53932574).

66626530 is a wasteful number, since it uses less digits than its factorization.

66626530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35081.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 66626530 is about 8162.5075803946. The cubic root of 66626530 is about 405.3987435978.

The spelling of 66626530 in words is "sixty-six million, six hundred twenty-six thousand, five hundred thirty".