66200406731 has 2 divisors, whose sum is σ = 66200406732. Its totient is φ = 66200406730.

The previous prime is 66200406683. The next prime is 66200406733. The reversal of 66200406731 is 13760400266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66200406731 - 2³⁰ = 65126664907 is a prime.

It is a super-2 number, since 2×66200406731² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 66200406733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66200406691 and 66200406700.

It is not a weakly prime, because it can be changed into another prime (66200406733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33100203365 + 33100203366.

It is an arithmetic number, because the mean of its divisors is an integer number (33100203366).

Almost surely, 2^66200406731 is an apocalyptic number.

66200406731 is a deficient number, since it is larger than the sum of its proper divisors (1).

66200406731 is an equidigital number, since it uses as much as digits as its factorization.

66200406731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 66200406731 its reverse (13760400266), we get a palindrome (79960806997).

The spelling of 66200406731 in words is "sixty-six billion, two hundred million, four hundred six thousand, seven hundred thirty-one".