66923652 has 48 divisors (see below), whose sum is σ = 166763520. Its totient is φ = 20838048.

The previous prime is 66923651. The next prime is 66923657. The reversal of 66923652 is 25632966.

It is a self number, because there is not a number n which added to its sum of digits gives 66923652.

It is not an unprimeable number, because it can be changed into a prime (66923651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9049 + ... + 14687.

It is an arithmetic number, because the mean of its divisors is an integer number (3474240).

Almost surely, 2^66923652 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 66923652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83381760).

66923652 is an abundant number, since it is smaller than the sum of its proper divisors (99839868).

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

66923652 is a wasteful number, since it uses less digits than its factorization.

66923652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5712 (or 5710 counting only the distinct ones).

The product of its digits is 116640, while the sum is 39.

The square root of 66923652 is about 8180.6877461495. The cubic root of 66923652 is about 406.0004772415. Note that the first 3 decimals are identical.

The spelling of 66923652 in words is "sixty-six million, nine hundred twenty-three thousand, six hundred fifty-two".