66523244 has 12 divisors (see below), whose sum is σ = 123263784. Its totient is φ = 31305024.

The previous prime is 66523243. The next prime is 66523277. The reversal of 66523244 is 44232566.

It is a self number, because there is not a number n which added to its sum of digits gives 66523244.

It is not an unprimeable number, because it can be changed into a prime (66523243) 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, 489074 + ... + 489209.

It is an arithmetic number, because the mean of its divisors is an integer number (10271982).

Almost surely, 2^66523244 is an apocalyptic number.

It is an amenable number.

66523244 is a deficient number, since it is larger than the sum of its proper divisors (56740540).

66523244 is a wasteful number, since it uses less digits than its factorization.

66523244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978304 (or 978302 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 66523244 is about 8156.1782717153. The cubic root of 66523244 is about 405.1891490601.

The spelling of 66523244 in words is "sixty-six million, five hundred twenty-three thousand, two hundred forty-four".