66326520090 has 16 divisors (see below), whose sum is σ = 159183648288. Its totient is φ = 17687072016.

The previous prime is 66326520083. The next prime is 66326520121. The reversal of 66326520090 is 9002562366.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1105441972 + ... + 1105442031.

It is an arithmetic number, because the mean of its divisors is an integer number (9948978018).

Almost surely, 2^66326520090 is an apocalyptic number.

66326520090 is an abundant number, since it is smaller than the sum of its proper divisors (92857128198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66326520090 is a wasteful number, since it uses less digits than its factorization.

66326520090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210884013.

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 66326520090 in words is "sixty-six billion, three hundred twenty-six million, five hundred twenty thousand, ninety".