61035126665 has 4 divisors (see below), whose sum is σ = 73242152004. Its totient is φ = 48828101328.

The previous prime is 61035126587. The next prime is 61035126671. The reversal of 61035126665 is 56662153016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37608069184 + 23427057481 = 193928^2 + 153059^2 .

It is a cyclic number.

It is not a de Polignac number, because 61035126665 - 2⁸ = 61035126409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6103512662 + ... + 6103512671.

It is an arithmetic number, because the mean of its divisors is an integer number (18310538001).

Almost surely, 2^61035126665 is an apocalyptic number.

It is an amenable number.

61035126665 is a deficient number, since it is larger than the sum of its proper divisors (12207025339).

61035126665 is a wasteful number, since it uses less digits than its factorization.

61035126665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12207025338.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 61035126665 in words is "sixty-one billion, thirty-five million, one hundred twenty-six thousand, six hundred sixty-five".