66019432 has 16 divisors (see below), whose sum is σ = 131068260. Its totient is φ = 31067904.

The previous prime is 66019417. The next prime is 66019439. The reversal of 66019432 is 23491066.

It can be written as a sum of positive squares in 2 ways, for example, as 64416676 + 1602756 = 8026^2 + 1266^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66019394 and 66019403.

It is not an unprimeable number, because it can be changed into a prime (66019439) 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, 242583 + ... + 242854.

Almost surely, 2^66019432 is an apocalyptic number.

It is an amenable number.

66019432 is a deficient number, since it is larger than the sum of its proper divisors (65048828).

66019432 is a wasteful number, since it uses less digits than its factorization.

66019432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485460 (or 485456 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 66019432 is about 8125.2342735456. The cubic root of 66019432 is about 404.1636594715.

The spelling of 66019432 in words is "sixty-six million, nineteen thousand, four hundred thirty-two".