42946566 has 64 divisors (see below), whose sum is σ = 99283968. Its totient is φ = 12279168.

The previous prime is 42946549. The next prime is 42946567. The reversal of 42946566 is 66564924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42946567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66055 + ... + 66701.

It is an arithmetic number, because the mean of its divisors is an integer number (1551312).

Almost surely, 2^42946566 is an apocalyptic number.

42946566 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 42946566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49641984).

42946566 is an abundant number, since it is smaller than the sum of its proper divisors (56337402).

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

42946566 is a wasteful number, since it uses less digits than its factorization.

42946566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its digits is 311040, while the sum is 42.

The square root of 42946566 is about 6553.3629534766. The cubic root of 42946566 is about 350.1946291649.

The spelling of 42946566 in words is "forty-two million, nine hundred forty-six thousand, five hundred sixty-six".