66146720586 has 16 divisors (see below), whose sum is σ = 133259088384. Its totient is φ = 21887965664.

The previous prime is 66146720581. The next prime is 66146720587. The reversal of 66146720586 is 68502764166.

It is not an unprimeable number, because it can be changed into a prime (66146720581) 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, 40234410 + ... + 40236053.

It is an arithmetic number, because the mean of its divisors is an integer number (8328693024).

Almost surely, 2^66146720586 is an apocalyptic number.

66146720586 is an abundant number, since it is smaller than the sum of its proper divisors (67112367798).

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

66146720586 is a wasteful number, since it uses less digits than its factorization.

66146720586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80470605.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 66146720586 in words is "sixty-six billion, one hundred forty-six million, seven hundred twenty thousand, five hundred eighty-six".