66724852 has 6 divisors (see below), whose sum is σ = 116768498. Its totient is φ = 33362424.

The previous prime is 66724849. The next prime is 66724859. The reversal of 66724852 is 25842766.

It can be written as a sum of positive squares in only one way, i.e., 65221776 + 1503076 = 8076^2 + 1226^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66724859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8340603 + ... + 8340610.

Almost surely, 2^66724852 is an apocalyptic number.

It is an amenable number.

66724852 is a deficient number, since it is larger than the sum of its proper divisors (50043646).

66724852 is a wasteful number, since it uses less digits than its factorization.

66724852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16681217 (or 16681215 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 66724852 is about 8168.5281415932. The cubic root of 66724852 is about 405.5980637192.

It can be divided in two parts, 66724 and 852, that added together give a palindrome (67576).

The spelling of 66724852 in words is "sixty-six million, seven hundred twenty-four thousand, eight hundred fifty-two".