406700670781 has 2 divisors, whose sum is σ = 406700670782. Its totient is φ = 406700670780.

The previous prime is 406700670667. The next prime is 406700670791. The reversal of 406700670781 is 187076007604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248037865156 + 158662805625 = 498034^2 + 398325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406700670781 is a prime.

It is a super-2 number, since 2×406700670781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406700670791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203350335390 + 203350335391.

It is an arithmetic number, because the mean of its divisors is an integer number (203350335391).

Almost surely, 2^406700670781 is an apocalyptic number.

It is an amenable number.

406700670781 is a deficient number, since it is larger than the sum of its proper divisors (1).

406700670781 is an equidigital number, since it uses as much as digits as its factorization.

406700670781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 406700670781 in words is "four hundred six billion, seven hundred million, six hundred seventy thousand, seven hundred eighty-one".