7665555461 has 2 divisors, whose sum is σ = 7665555462. Its totient is φ = 7665555460.

The previous prime is 7665555431. The next prime is 7665555467. The reversal of 7665555461 is 1645555667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6834328900 + 831226561 = 82670^2 + 28831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7665555461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7665555467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832777730 + 3832777731.

It is an arithmetic number, because the mean of its divisors is an integer number (3832777731).

Almost surely, 2^7665555461 is an apocalyptic number.

It is an amenable number.

7665555461 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665555461 is an equidigital number, since it uses as much as digits as its factorization.

7665555461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780000, while the sum is 50.

The square root of 7665555461 is about 87553.1579156343. The cubic root of 7665555461 is about 1971.7319631700.

The spelling of 7665555461 in words is "seven billion, six hundred sixty-five million, five hundred fifty-five thousand, four hundred sixty-one".