42066994 has 8 divisors (see below), whose sum is σ = 65276460. Its totient is φ = 20308176.

The previous prime is 42066991. The next prime is 42067013. The reversal of 42066994 is 49966024.

It can be written as a sum of positive squares in 2 ways, for example, as 41434969 + 632025 = 6437^2 + 795^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42066991) 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, 362589 + ... + 362704.

Almost surely, 2^42066994 is an apocalyptic number.

42066994 is a deficient number, since it is larger than the sum of its proper divisors (23209466).

42066994 is a wasteful number, since it uses less digits than its factorization.

42066994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725324.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 42066994 is about 6485.9073382218. The cubic root of 42066994 is about 347.7873860922.

The spelling of 42066994 in words is "forty-two million, sixty-six thousand, nine hundred ninety-four".