42166680 has 64 divisors (see below), whose sum is σ = 129932640. Its totient is φ = 10939392.

The previous prime is 42166679. The next prime is 42166697. The reversal of 42166680 is 8666124.

It is a happy number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 309 + ... + 9188.

Almost surely, 2^42166680 is an apocalyptic number.

42166680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42166680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64966320).

42166680 is an abundant number, since it is smaller than the sum of its proper divisors (87765960).

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

42166680 is a wasteful number, since it uses less digits than its factorization.

42166680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9548 (or 9544 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 42166680 is about 6493.5876062466. The cubic root of 42166680 is about 348.0618862062.

The spelling of 42166680 in words is "forty-two million, one hundred sixty-six thousand, six hundred eighty".