66650716224 has 189 divisors, whose sum is σ = 197974218351. Its totient is φ = 21438270720.

The previous prime is 66650716219. The next prime is 66650716229. The reversal of 66650716224 is 42261705666.

The square root of 66650716224 is 258168.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (66650716219) and next prime (66650716229).

It is a self number, because there is not a number n which added to its sum of digits gives 66650716224.

It is not an unprimeable number, because it can be changed into a prime (66650716229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 192076819 + ... + 192077165.

Almost surely, 2^66650716224 is an apocalyptic number.

66650716224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

66650716224 is the 258168-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66650716224

66650716224 is an abundant number, since it is smaller than the sum of its proper divisors (131323502127).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66650716224 is an equidigital number, since it uses as much as digits as its factorization.

66650716224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 66650716224 in words is "sixty-six billion, six hundred fifty million, seven hundred sixteen thousand, two hundred twenty-four".