61006661705 has 32 divisors (see below), whose sum is σ = 80570585088. Its totient is φ = 43976217600.

The previous prime is 61006661693. The next prime is 61006661759. The reversal of 61006661705 is 50716660016.

It is not a de Polignac number, because 61006661705 - 2¹⁰ = 61006660681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8329445 + ... + 8336765.

It is an arithmetic number, because the mean of its divisors is an integer number (2517830784).

Almost surely, 2^61006661705 is an apocalyptic number.

It is an amenable number.

61006661705 is a deficient number, since it is larger than the sum of its proper divisors (19563923383).

61006661705 is a wasteful number, since it uses less digits than its factorization.

61006661705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 61006661705 in words is "sixty-one billion, six million, six hundred sixty-one thousand, seven hundred five".