42686666815 has 24 divisors (see below), whose sum is σ = 56542739904. Its totient is φ = 30753542400.

The previous prime is 42686666809. The next prime is 42686666839. The reversal of 42686666815 is 51866668624.

It is not a de Polignac number, because 42686666815 - 2³ = 42686666807 is a prime.

It is a super-3 number, since 3×42686666815³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42686666815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86071 + ... + 304600.

It is an arithmetic number, because the mean of its divisors is an integer number (2355947496).

Almost surely, 2^42686666815 is an apocalyptic number.

42686666815 is a deficient number, since it is larger than the sum of its proper divisors (13856073089).

42686666815 is a wasteful number, since it uses less digits than its factorization.

42686666815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390771 (or 390730 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 58.

The spelling of 42686666815 in words is "forty-two billion, six hundred eighty-six million, six hundred sixty-six thousand, eight hundred fifteen".