655994611 has 2 divisors, whose sum is σ = 655994612. Its totient is φ = 655994610.

The previous prime is 655994561. The next prime is 655994617. The reversal of 655994611 is 116499556.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655994611 - 2¹⁷ = 655863539 is a prime.

It is a super-2 number, since 2×655994611² = 860657859322082642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655994617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327997305 + 327997306.

It is an arithmetic number, because the mean of its divisors is an integer number (327997306).

Almost surely, 2^655994611 is an apocalyptic number.

655994611 is a deficient number, since it is larger than the sum of its proper divisors (1).

655994611 is an equidigital number, since it uses as much as digits as its factorization.

655994611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 46.

The square root of 655994611 is about 25612.3917469650. The cubic root of 655994611 is about 868.8939178372.

The spelling of 655994611 in words is "six hundred fifty-five million, nine hundred ninety-four thousand, six hundred eleven".