355602661 has 2 divisors, whose sum is σ = 355602662. Its totient is φ = 355602660.

The previous prime is 355602649. The next prime is 355602703. The reversal of 355602661 is 166206553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349914436 + 5688225 = 18706^2 + 2385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-355602661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355602631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177801330 + 177801331.

It is an arithmetic number, because the mean of its divisors is an integer number (177801331).

Almost surely, 2^355602661 is an apocalyptic number.

It is an amenable number.

355602661 is a deficient number, since it is larger than the sum of its proper divisors (1).

355602661 is an equidigital number, since it uses as much as digits as its factorization.

355602661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 355602661 is about 18857.4298619934. The cubic root of 355602661 is about 708.4703303678.

The spelling of 355602661 in words is "three hundred fifty-five million, six hundred two thousand, six hundred sixty-one".