66911232 has 88 divisors (see below), whose sum is σ = 186293376. Its totient is φ = 21311488.

The previous prime is 66911227. The next prime is 66911233. The reversal of 66911232 is 23211966.

It is a super-2 number, since 2×66911232² = 8954225935515648, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66911232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66911233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70183 + ... + 71129.

Almost surely, 2^66911232 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 66911232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93146688).

66911232 is an abundant number, since it is smaller than the sum of its proper divisors (119382144).

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

66911232 is a wasteful number, since it uses less digits than its factorization.

66911232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 975 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

The square root of 66911232 is about 8179.9286060454. The cubic root of 66911232 is about 405.9753598739.

The spelling of 66911232 in words is "sixty-six million, nine hundred eleven thousand, two hundred thirty-two".