66144032 has 12 divisors (see below), whose sum is σ = 130221126. Its totient is φ = 33072000.

The previous prime is 66144017. The next prime is 66144037. The reversal of 66144032 is 23044166.

It can be written as a sum of positive squares in only one way, i.e., 65869456 + 274576 = 8116^2 + 524^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66143992 and 66144010.

It is not an unprimeable number, because it can be changed into a prime (66144037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033469 + ... + 1033532.

Almost surely, 2^66144032 is an apocalyptic number.

It is an amenable number.

66144032 is a deficient number, since it is larger than the sum of its proper divisors (64077094).

66144032 is a wasteful number, since it uses less digits than its factorization.

66144032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067011 (or 2067003 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66144032 is about 8132.8981304330. The cubic root of 66144032 is about 404.4177621527.

Adding to 66144032 its reverse (23044166), we get a palindrome (89188198).

The spelling of 66144032 in words is "sixty-six million, one hundred forty-four thousand, thirty-two".