66301611004431 has 24 divisors (see below), whose sum is σ = 104477265796176. Its totient is φ = 40182025328640.

The previous prime is 66301611004417. The next prime is 66301611004469. The reversal of 66301611004431 is 13440011610366.

66301611004431 is a `hidden beast` number, since 6 + 6 + 3 + 0 + 1 + 611 + 0 + 0 + 4 + 4 + 31 = 666.

It is not a de Polignac number, because 66301611004431 - 2¹³ = 66301610996239 is a prime.

It is a super-2 number, since 2×66301611004431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66301611006431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1191090 + ... + 11576783.

It is an arithmetic number, because the mean of its divisors is an integer number (4353219408174).

Almost surely, 2^{66301611004431} is an apocalyptic number.

66301611004431 is a deficient number, since it is larger than the sum of its proper divisors (38175654791745).

66301611004431 is a wasteful number, since it uses less digits than its factorization.

66301611004431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12820343 (or 12820340 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Adding to 66301611004431 its reverse (13440011610366), we get a palindrome (79741622614797).

The spelling of 66301611004431 in words is "sixty-six trillion, three hundred one billion, six hundred eleven million, four thousand, four hundred thirty-one".