66224464 has 10 divisors (see below), whose sum is σ = 128309930. Its totient is φ = 33112224.

The previous prime is 66224453. The next prime is 66224479. The reversal of 66224464 is 46442266.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 2862864 = 7960^2 + 1692^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069499 + ... + 2069530.

It is an arithmetic number, because the mean of its divisors is an integer number (12830993).

Almost surely, 2^66224464 is an apocalyptic number.

It is an amenable number.

66224464 is a deficient number, since it is larger than the sum of its proper divisors (62085466).

66224464 is a wasteful number, since it uses less digits than its factorization.

66224464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139037 (or 4139031 counting only the distinct ones).

The product of its digits is 55296, while the sum is 34.

The square root of 66224464 is about 8137.8414828504. The cubic root of 66224464 is about 404.5816214986.

The spelling of 66224464 in words is "sixty-six million, two hundred twenty-four thousand, four hundred sixty-four".