42666426 has 96 divisors (see below), whose sum is σ = 109444608. Its totient is φ = 12331440.

The previous prime is 42666397. The next prime is 42666433. The reversal of 42666426 is 62466624.

It is a super-2 number, since 2×42666426² = 3640847815226952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122785 + ... + 123131.

It is an arithmetic number, because the mean of its divisors is an integer number (1140048).

Almost surely, 2^42666426 is an apocalyptic number.

42666426 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 42666426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54722304).

42666426 is an abundant number, since it is smaller than the sum of its proper divisors (66778182).

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

42666426 is a wasteful number, since it uses less digits than its factorization.

42666426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 386 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 42666426 is about 6531.9542251917. The cubic root of 42666426 is about 349.4315288880.

The spelling of 42666426 in words is "forty-two million, six hundred sixty-six thousand, four hundred twenty-six".