42015635666 has 32 divisors (see below), whose sum is σ = 66032547840. Its totient is φ = 20026828800.

The previous prime is 42015635659. The next prime is 42015635689. The reversal of 42015635666 is 66653651024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1481330 + ... + 1509426.

It is an arithmetic number, because the mean of its divisors is an integer number (2063517120).

Almost surely, 2^42015635666 is an apocalyptic number.

42015635666 is a deficient number, since it is larger than the sum of its proper divisors (24016912174).

42015635666 is a wasteful number, since it uses less digits than its factorization.

42015635666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28490.

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

The spelling of 42015635666 in words is "forty-two billion, fifteen million, six hundred thirty-five thousand, six hundred sixty-six".