8661426061 has 2 divisors, whose sum is σ = 8661426062. Its totient is φ = 8661426060.

The previous prime is 8661426023. The next prime is 8661426113. The reversal of 8661426061 is 1606241668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6873404836 + 1788021225 = 82906^2 + 42285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8661426061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8661426461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4330713030 + 4330713031.

It is an arithmetic number, because the mean of its divisors is an integer number (4330713031).

Almost surely, 2^8661426061 is an apocalyptic number.

It is an amenable number.

8661426061 is a deficient number, since it is larger than the sum of its proper divisors (1).

8661426061 is an equidigital number, since it uses as much as digits as its factorization.

8661426061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 8661426061 is about 93066.7828013841. The cubic root of 8661426061 is about 2053.6659417877.

The spelling of 8661426061 in words is "eight billion, six hundred sixty-one million, four hundred twenty-six thousand, sixty-one".