602666261 has 2 divisors, whose sum is σ = 602666262. Its totient is φ = 602666260.

The previous prime is 602666243. The next prime is 602666291. The reversal of 602666261 is 162666206.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415140625 + 187525636 = 20375^2 + 13694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-602666261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (602666221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301333130 + 301333131.

It is an arithmetic number, because the mean of its divisors is an integer number (301333131).

Almost surely, 2^602666261 is an apocalyptic number.

It is an amenable number.

602666261 is a deficient number, since it is larger than the sum of its proper divisors (1).

602666261 is an equidigital number, since it uses as much as digits as its factorization.

602666261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 602666261 is about 24549.2619237320. The cubic root of 602666261 is about 844.6801590545.

The spelling of 602666261 in words is "six hundred two million, six hundred sixty-six thousand, two hundred sixty-one".