42066599 has 6 divisors (see below), whose sum is σ = 43069536. Its totient is φ = 41086500.

The previous prime is 42066593. The next prime is 42066643. The reversal of 42066599 is 99566024.

It is not a de Polignac number, because 42066599 - 2²⁰ = 41018023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42066593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9527 + ... + 13224.

It is an arithmetic number, because the mean of its divisors is an integer number (7178256).

Almost surely, 2^42066599 is an apocalyptic number.

42066599 is a deficient number, since it is larger than the sum of its proper divisors (1002937).

42066599 is an equidigital number, since it uses as much as digits as its factorization.

42066599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22837 (or 22794 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 42066599 is about 6485.8768875149. The cubic root of 42066599 is about 347.7862975393.

The spelling of 42066599 in words is "forty-two million, sixty-six thousand, five hundred ninety-nine".