66361633107 has 64 divisors (see below), whose sum is σ = 112821888000. Its totient is φ = 34395459840.

The previous prime is 66361633031. The next prime is 66361633111. The reversal of 66361633107 is 70133616366.

It is not a de Polignac number, because 66361633107 - 2⁷ = 66361632979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66361633607) 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, 5166369 + ... + 5179197.

It is an arithmetic number, because the mean of its divisors is an integer number (1762842000).

Almost surely, 2^66361633107 is an apocalyptic number.

66361633107 is a deficient number, since it is larger than the sum of its proper divisors (46460254893).

66361633107 is a wasteful number, since it uses less digits than its factorization.

66361633107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13321 (or 13307 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 42.

The spelling of 66361633107 in words is "sixty-six billion, three hundred sixty-one million, six hundred thirty-three thousand, one hundred seven".