961586658 has 18 divisors (see below), whose sum is σ = 2083722849. Its totient is φ = 320485032.

The previous prime is 961586651. The next prime is 961586699. The reversal of 961586658 is 856685169.

It is a happy number.

961586658 is a `hidden beast` number, since 9 + 6 + 1 + 586 + 6 + 58 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 958335849 + 3250809 = 30957^2 + 1803^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=21927.

It is not an unprimeable number, because it can be changed into a prime (961586651) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 127908 + ... + 135216.

Almost surely, 2^961586658 is an apocalyptic number.

961586658 is an abundant number, since it is smaller than the sum of its proper divisors (1122136191).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

961586658 is an frugal number, since it uses more digits than its factorization.

961586658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14626 (or 7314 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 961586658 is about 31009.4607821549. The cubic root of 961586658 is about 987.0280076925.

The spelling of 961586658 in words is "nine hundred sixty-one million, five hundred eighty-six thousand, six hundred fifty-eight".