661104654445 has 32 divisors (see below), whose sum is σ = 867261136896. Its totient is φ = 481619712000.

The previous prime is 661104654433. The next prime is 661104654487. The reversal of 661104654445 is 544456401166.

It is not a de Polignac number, because 661104654445 - 2²⁵ = 661071100013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 661104654395 and 661104654404.

It is a congruent 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, 14884020 + ... + 14928370.

It is an arithmetic number, because the mean of its divisors is an integer number (27101910528).

Almost surely, 2^661104654445 is an apocalyptic number.

It is an amenable number.

661104654445 is a deficient number, since it is larger than the sum of its proper divisors (206156482451).

661104654445 is a wasteful number, since it uses less digits than its factorization.

661104654445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50061.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 661104654445 in words is "six hundred sixty-one billion, one hundred four million, six hundred fifty-four thousand, four hundred forty-five".