7661361937 has 2 divisors, whose sum is σ = 7661361938. Its totient is φ = 7661361936.

The previous prime is 7661361913. The next prime is 7661361971. The reversal of 7661361937 is 7391631667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7357522176 + 303839761 = 85776^2 + 17431^2 .

It is a cyclic number.

It is not a de Polignac number, because 7661361937 - 2⁷ = 7661361809 is a prime.

It is not a weakly prime, because it can be changed into another prime (7661361437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830680968 + 3830680969.

It is an arithmetic number, because the mean of its divisors is an integer number (3830680969).

Almost surely, 2^7661361937 is an apocalyptic number.

It is an amenable number.

7661361937 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661361937 is an equidigital number, since it uses as much as digits as its factorization.

7661361937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 49.

The square root of 7661361937 is about 87529.2061942755. The cubic root of 7661361937 is about 1971.3723452401.

The spelling of 7661361937 in words is "seven billion, six hundred sixty-one million, three hundred sixty-one thousand, nine hundred thirty-seven".