66764152 has 64 divisors (see below), whose sum is σ = 155090880. Its totient is φ = 26237952.

The previous prime is 66764149. The next prime is 66764161. The reversal of 66764152 is 25146766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213148 + ... + 213460.

It is an arithmetic number, because the mean of its divisors is an integer number (2423295).

Almost surely, 2^66764152 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 66764152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77545440).

66764152 is an abundant number, since it is smaller than the sum of its proper divisors (88326728).

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

66764152 is a wasteful number, since it uses less digits than its factorization.

66764152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 628 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 66764152 is about 8170.9333616179. The cubic root of 66764152 is about 405.6776786102.

The spelling of 66764152 in words is "sixty-six million, seven hundred sixty-four thousand, one hundred fifty-two".