6640351532 has 6 divisors (see below), whose sum is σ = 11620615188. Its totient is φ = 3320175764.

The previous prime is 6640351519. The next prime is 6640351541. The reversal of 6640351532 is 2351530466.

It is a junction number, because it is equal to n+sod(n) for n = 6640351492 and 6640351501.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830043938 + ... + 830043945.

It is an arithmetic number, because the mean of its divisors is an integer number (1936769198).

Almost surely, 2^6640351532 is an apocalyptic number.

It is an amenable number.

6640351532 is a deficient number, since it is larger than the sum of its proper divisors (4980263656).

6640351532 is a wasteful number, since it uses less digits than its factorization.

6640351532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660087887 (or 1660087885 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 6640351532 is about 81488.3521247055. The cubic root of 6640351532 is about 1879.5924433426.

Adding to 6640351532 its reverse (2351530466), we get a palindrome (8991881998).

The spelling of 6640351532 in words is "six billion, six hundred forty million, three hundred fifty-one thousand, five hundred thirty-two".