66100050031 has 2 divisors, whose sum is σ = 66100050032. Its totient is φ = 66100050030.

The previous prime is 66100049971. The next prime is 66100050047. The reversal of 66100050031 is 13005000166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66100050031 - 2¹¹ = 66100047983 is a prime.

It is a super-2 number, since 2×66100050031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66100049984 and 66100050011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66100050631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33050025015 + 33050025016.

It is an arithmetic number, because the mean of its divisors is an integer number (33050025016).

Almost surely, 2^66100050031 is an apocalyptic number.

66100050031 is a deficient number, since it is larger than the sum of its proper divisors (1).

66100050031 is an equidigital number, since it uses as much as digits as its factorization.

66100050031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 66100050031 its reverse (13005000166), we get a palindrome (79105050197).

The spelling of 66100050031 in words is "sixty-six billion, one hundred million, fifty thousand, thirty-one".