42666434 has 8 divisors (see below), whose sum is σ = 64141068. Its totient is φ = 21286080.

The previous prime is 42666433. The next prime is 42666443. The reversal of 42666434 is 43466624.

It can be written as a sum of positive squares in 2 ways, for example, as 30085225 + 12581209 = 5485^2 + 3547^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 42666394 and 42666403.

It is not an unprimeable number, because it can be changed into a prime (42666433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22427 + ... + 24254.

Almost surely, 2^42666434 is an apocalyptic number.

42666434 is a deficient number, since it is larger than the sum of its proper divisors (21474634).

42666434 is a wasteful number, since it uses less digits than its factorization.

42666434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47140.

The product of its digits is 82944, while the sum is 35.

The square root of 42666434 is about 6531.9548375659. The cubic root of 42666434 is about 349.4315507276.

The spelling of 42666434 in words is "forty-two million, six hundred sixty-six thousand, four hundred thirty-four".