42087666 has 8 divisors (see below), whose sum is σ = 84175344. Its totient is φ = 14029220.

The previous prime is 42087653. The next prime is 42087697. The reversal of 42087666 is 66678024.

It is a sphenic number, since it is the product of 3 distinct primes.

42087666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3507300 + ... + 3507311.

It is an arithmetic number, because the mean of its divisors is an integer number (10521918).

Almost surely, 2^42087666 is an apocalyptic number.

42087666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42087666 is a wasteful number, since it uses less digits than its factorization.

42087666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014616.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 42087666 is about 6487.5007514450. The cubic root of 42087666 is about 347.8443451063.

The spelling of 42087666 in words is "forty-two million, eighty-seven thousand, six hundred sixty-six".