66130632 has 24 divisors (see below), whose sum is σ = 179103990. Its totient is φ = 22043520.

The previous prime is 66130609. The next prime is 66130637. The reversal of 66130632 is 23603166.

It can be written as a sum of positive squares in only one way, i.e., 65512836 + 617796 = 8094^2 + 786^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 66130596 and 66130605.

It is not an unprimeable number, because it can be changed into a prime (66130637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459169 + ... + 459312.

Almost surely, 2^66130632 is an apocalyptic number.

It is an amenable number.

66130632 is an abundant number, since it is smaller than the sum of its proper divisors (112973358).

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

66130632 is a wasteful number, since it uses less digits than its factorization.

66130632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918493 (or 918486 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 66130632 is about 8132.0742741320. The cubic root of 66130632 is about 404.3904502202.

Adding to 66130632 its reverse (23603166), we get a palindrome (89733798).

The spelling of 66130632 in words is "sixty-six million, one hundred thirty thousand, six hundred thirty-two".