66019404 has 48 divisors (see below), whose sum is σ = 168577920. Its totient is φ = 19943040.

The previous prime is 66019403. The next prime is 66019417. The reversal of 66019404 is 40491066.

It is not an unprimeable number, because it can be changed into a prime (66019403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57912 + ... + 59040.

It is an arithmetic number, because the mean of its divisors is an integer number (3512040).

Almost surely, 2^66019404 is an apocalyptic number.

It is an amenable number.

66019404 is an abundant number, since it is smaller than the sum of its proper divisors (102558516).

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

66019404 is a wasteful number, since it uses less digits than its factorization.

66019404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1588 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66019404 is about 8125.2325505182. The cubic root of 66019404 is about 404.1636023338.

The spelling of 66019404 in words is "sixty-six million, nineteen thousand, four hundred four".