42013566665 has 16 divisors (see below), whose sum is σ = 58705751808. Its totient is φ = 28265729856.

The previous prime is 42013566613. The next prime is 42013566671. The reversal of 42013566665 is 56666531024.

It is not a de Polignac number, because 42013566665 - 2⁶ = 42013566601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11322557 + ... + 11326266.

It is an arithmetic number, because the mean of its divisors is an integer number (3669109488).

Almost surely, 2^42013566665 is an apocalyptic number.

It is an amenable number.

42013566665 is a deficient number, since it is larger than the sum of its proper divisors (16692185143).

42013566665 is a wasteful number, since it uses less digits than its factorization.

42013566665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22648888.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 42013566665 in words is "forty-two billion, thirteen million, five hundred sixty-six thousand, six hundred sixty-five".