66661050650130 has 96 divisors (see below), whose sum is σ = 181143644900400. Its totient is φ = 16986363641856.

The previous prime is 66661050649969. The next prime is 66661050650143. The reversal of 66661050650130 is 3105605016666.

It can be written as a sum of positive squares in 8 ways, for example, as 15515224689969 + 51145825960161 = 3938937^2 + 7151631^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131399575 + ... + 131905914.

Almost surely, 2^{66661050650130} is an apocalyptic number.

66661050650130 is an abundant number, since it is smaller than the sum of its proper divisors (114482594250270).

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

66661050650130 is a wasteful number, since it uses less digits than its factorization.

66661050650130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263305628 (or 263305625 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

Adding to 66661050650130 its reverse (3105605016666), we get a palindrome (69766655666796).

The spelling of 66661050650130 in words is "sixty-six trillion, six hundred sixty-one billion, fifty million, six hundred fifty thousand, one hundred thirty".