66158472 has 16 divisors (see below), whose sum is σ = 165396240. Its totient is φ = 22052816.

The previous prime is 66158459. The next prime is 66158507. The reversal of 66158472 is 27485166.

It is a self number, because there is not a number n which added to its sum of digits gives 66158472.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378278 + ... + 1378325.

It is an arithmetic number, because the mean of its divisors is an integer number (10337265).

Almost surely, 2^66158472 is an apocalyptic number.

It is an amenable number.

66158472 is an abundant number, since it is smaller than the sum of its proper divisors (99237768).

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

66158472 is a wasteful number, since it uses less digits than its factorization.

66158472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756612 (or 2756608 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 66158472 is about 8133.7858344070. The cubic root of 66158472 is about 404.4471896883.

The spelling of 66158472 in words is "sixty-six million, one hundred fifty-eight thousand, four hundred seventy-two".