42066611 has 4 divisors (see below), whose sum is σ = 42301800. Its totient is φ = 41831424.

The previous prime is 42066593. The next prime is 42066643. The reversal of 42066611 is 11666024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42066611 - 2¹⁴ = 42050227 is a prime.

It is a super-2 number, since 2×42066611² = 3539199522050642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42066671) 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, 117326 + ... + 117683.

It is an arithmetic number, because the mean of its divisors is an integer number (10575450).

Almost surely, 2^42066611 is an apocalyptic number.

42066611 is a deficient number, since it is larger than the sum of its proper divisors (235189).

42066611 is a wasteful number, since it uses less digits than its factorization.

42066611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235188.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42066611 is about 6485.8778126018. The cubic root of 42066611 is about 347.7863306093.

The spelling of 42066611 in words is "forty-two million, sixty-six thousand, six hundred eleven".