7611661273 has 2 divisors, whose sum is σ = 7611661274. Its totient is φ = 7611661272.

The previous prime is 7611661249. The next prime is 7611661279. The reversal of 7611661273 is 3721661167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7321026969 + 290634304 = 85563^2 + 17048^2 .

It is a cyclic number.

It is not a de Polignac number, because 7611661273 - 2²¹ = 7609564121 is a prime.

It is not a weakly prime, because it can be changed into another prime (7611661279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3805830636 + 3805830637.

It is an arithmetic number, because the mean of its divisors is an integer number (3805830637).

Almost surely, 2^7611661273 is an apocalyptic number.

It is an amenable number.

7611661273 is a deficient number, since it is larger than the sum of its proper divisors (1).

7611661273 is an equidigital number, since it uses as much as digits as its factorization.

7611661273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 7611661273 is about 87244.8352224933. The cubic root of 7611661273 is about 1967.1002088383.

The spelling of 7611661273 in words is "seven billion, six hundred eleven million, six hundred sixty-one thousand, two hundred seventy-three".