66402132 has 12 divisors (see below), whose sum is σ = 154938336. Its totient is φ = 22134040.

The previous prime is 66402103. The next prime is 66402139. The reversal of 66402132 is 23120466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66402139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2766744 + ... + 2766767.

It is an arithmetic number, because the mean of its divisors is an integer number (12911528).

Almost surely, 2^66402132 is an apocalyptic number.

It is an amenable number.

66402132 is an abundant number, since it is smaller than the sum of its proper divisors (88536204).

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

66402132 is a wasteful number, since it uses less digits than its factorization.

66402132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533518 (or 5533516 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 66402132 is about 8148.7503336401. The cubic root of 66402132 is about 404.9431043379.

Adding to 66402132 its reverse (23120466), we get a palindrome (89522598).

The spelling of 66402132 in words is "sixty-six million, four hundred two thousand, one hundred thirty-two".