306664204261 has 2 divisors, whose sum is σ = 306664204262. Its totient is φ = 306664204260.

The previous prime is 306664204219. The next prime is 306664204277. The reversal of 306664204261 is 162402466603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304251528100 + 2412676161 = 551590^2 + 49119^2 .

It is a cyclic number.

It is not a de Polignac number, because 306664204261 - 2¹¹ = 306664202213 is a prime.

It is a super-2 number, since 2×306664204261² (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 (306664207261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153332102130 + 153332102131.

It is an arithmetic number, because the mean of its divisors is an integer number (153332102131).

Almost surely, 2^306664204261 is an apocalyptic number.

It is an amenable number.

306664204261 is a deficient number, since it is larger than the sum of its proper divisors (1).

306664204261 is an equidigital number, since it uses as much as digits as its factorization.

306664204261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 306664204261 in words is "three hundred six billion, six hundred sixty-four million, two hundred four thousand, two hundred sixty-one".