6661546532 has 6 divisors (see below), whose sum is σ = 11657706438. Its totient is φ = 3330773264.

The previous prime is 6661546531. The next prime is 6661546553. The reversal of 6661546532 is 2356451666.

It can be written as a sum of positive squares in only one way, i.e., 6276759076 + 384787456 = 79226^2 + 19616^2 .

It is not an unprimeable number, because it can be changed into a prime (6661546531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832693313 + ... + 832693320.

It is an arithmetic number, because the mean of its divisors is an integer number (1942951073).

Almost surely, 2^6661546532 is an apocalyptic number.

It is an amenable number.

6661546532 is a deficient number, since it is larger than the sum of its proper divisors (4996159906).

6661546532 is a wasteful number, since it uses less digits than its factorization.

6661546532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665386637 (or 1665386635 counting only the distinct ones).

The product of its digits is 777600, while the sum is 44.

The square root of 6661546532 is about 81618.2977769078. The cubic root of 6661546532 is about 1881.5901112400.

The spelling of 6661546532 in words is "six billion, six hundred sixty-one million, five hundred forty-six thousand, five hundred thirty-two".