66147236 has 12 divisors (see below), whose sum is σ = 118220928. Its totient is φ = 32369832.

The previous prime is 66147217. The next prime is 66147239. The reversal of 66147236 is 63274166.

It is a junction number, because it is equal to n+sod(n) for n = 66147196 and 66147205.

It is not an unprimeable number, because it can be changed into a prime (66147239) 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, 175736 + ... + 176111.

It is an arithmetic number, because the mean of its divisors is an integer number (9851744).

Almost surely, 2^66147236 is an apocalyptic number.

It is an amenable number.

66147236 is a deficient number, since it is larger than the sum of its proper divisors (52073692).

66147236 is a wasteful number, since it uses less digits than its factorization.

66147236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351898 (or 351896 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 66147236 is about 8133.0951058007. The cubic root of 66147236 is about 404.4242920116.

The spelling of 66147236 in words is "sixty-six million, one hundred forty-seven thousand, two hundred thirty-six".