42878401566806 has 8 divisors (see below), whose sum is σ = 69265110223344. Its totient is φ = 19790031492360.

The previous prime is 42878401566799. The next prime is 42878401566887. The reversal of 42878401566806 is 60866510487824.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824584645490 + ... + 824584645541.

It is an arithmetic number, because the mean of its divisors is an integer number (8658138777918).

Almost surely, 2^{42878401566806} is an apocalyptic number.

42878401566806 is a deficient number, since it is larger than the sum of its proper divisors (26386708656538).

42878401566806 is a wasteful number, since it uses less digits than its factorization.

42878401566806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649169291046.

The product of its (nonzero) digits is 123863040, while the sum is 65.

The spelling of 42878401566806 in words is "forty-two trillion, eight hundred seventy-eight billion, four hundred one million, five hundred sixty-six thousand, eight hundred six".