116606561 has 2 divisors, whose sum is σ = 116606562. Its totient is φ = 116606560.

The previous prime is 116606557. The next prime is 116606627. The reversal of 116606561 is 165606611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116208400 + 398161 = 10780^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 116606561 - 2² = 116606557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (116606461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58303280 + 58303281.

It is an arithmetic number, because the mean of its divisors is an integer number (58303281).

Almost surely, 2^116606561 is an apocalyptic number.

It is an amenable number.

116606561 is a deficient number, since it is larger than the sum of its proper divisors (1).

116606561 is an equidigital number, since it uses as much as digits as its factorization.

116606561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 116606561 is about 10798.4517871776. The cubic root of 116606561 is about 488.5484754696.

Subtracting 116606561 from its reverse (165606611), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 116606561 in words is "one hundred sixteen million, six hundred six thousand, five hundred sixty-one".