66747552 has 48 divisors (see below), whose sum is σ = 176268960. Its totient is φ = 22115072.

The previous prime is 66747547. The next prime is 66747581. The reversal of 66747552 is 25574766.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14599 + ... + 18617.

It is an arithmetic number, because the mean of its divisors is an integer number (3672270).

Almost surely, 2^66747552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66747552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88134480).

66747552 is an abundant number, since it is smaller than the sum of its proper divisors (109521408).

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

66747552 is a wasteful number, since it uses less digits than its factorization.

66747552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205 (or 4197 counting only the distinct ones).

The product of its digits is 352800, while the sum is 42.

The square root of 66747552 is about 8169.9175026435. The cubic root of 66747552 is about 405.6440537408.

The spelling of 66747552 in words is "sixty-six million, seven hundred forty-seven thousand, five hundred fifty-two".