366802561 has 2 divisors, whose sum is σ = 366802562. Its totient is φ = 366802560.

The previous prime is 366802531. The next prime is 366802603. The reversal of 366802561 is 165208663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310852161 + 55950400 = 17631^2 + 7480^2 .

It is a cyclic number.

It is not a de Polignac number, because 366802561 - 2⁵ = 366802529 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 366802561.

It is not a weakly prime, because it can be changed into another prime (366802531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183401280 + 183401281.

It is an arithmetic number, because the mean of its divisors is an integer number (183401281).

Almost surely, 2^366802561 is an apocalyptic number.

It is an amenable number.

366802561 is a deficient number, since it is larger than the sum of its proper divisors (1).

366802561 is an equidigital number, since it uses as much as digits as its factorization.

366802561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 366802561 is about 19152.0902514582. The cubic root of 366802561 is about 715.8314685321.

The spelling of 366802561 in words is "three hundred sixty-six million, eight hundred two thousand, five hundred sixty-one".