42166280646 has 80 divisors (see below), whose sum is σ = 108022701600. Its totient is φ = 12042898560.

The previous prime is 42166280641. The next prime is 42166280671. The reversal of 42166280646 is 64608266124.

42166280646 is a `hidden beast` number, since 4 + 2 + 16 + 628 + 0 + 6 + 4 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42166280641) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 3905776 + ... + 3916556.

It is an arithmetic number, because the mean of its divisors is an integer number (1350283770).

Almost surely, 2^42166280646 is an apocalyptic number.

42166280646 is an abundant number, since it is smaller than the sum of its proper divisors (65856420954).

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

42166280646 is a wasteful number, since it uses less digits than its factorization.

42166280646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14251 (or 14242 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 42166280646 in words is "forty-two billion, one hundred sixty-six million, two hundred eighty thousand, six hundred forty-six".