66783107032530 has 128 divisors (see below), whose sum is σ = 183436430284800. Its totient is φ = 15243055939584.

The previous prime is 66783107032519. The next prime is 66783107032531. The reversal of 66783107032530 is 3523070138766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66783107032531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1753600869 + ... + 1753638951.

It is an arithmetic number, because the mean of its divisors is an integer number (1433097111600).

Almost surely, 2^{66783107032530} is an apocalyptic number.

66783107032530 is an abundant number, since it is smaller than the sum of its proper divisors (116653323252270).

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

66783107032530 is a wasteful number, since it uses less digits than its factorization.

66783107032530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49728.

The product of its (nonzero) digits is 3810240, while the sum is 51.

The spelling of 66783107032530 in words is "sixty-six trillion, seven hundred eighty-three billion, one hundred seven million, thirty-two thousand, five hundred thirty".