6641500551 has 32 divisors (see below), whose sum is σ = 10724571648. Its totient is φ = 3568942080.

The previous prime is 6641500519. The next prime is 6641500571. The reversal of 6641500551 is 1550051466.

It is not a de Polignac number, because 6641500551 - 2⁵ = 6641500519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641500501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464556 + ... + 478638.

It is an arithmetic number, because the mean of its divisors is an integer number (335142864).

Almost surely, 2^6641500551 is an apocalyptic number.

6641500551 is a deficient number, since it is larger than the sum of its proper divisors (4083071097).

6641500551 is a wasteful number, since it uses less digits than its factorization.

6641500551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15431.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 6641500551 is about 81495.4020236725. The cubic root of 6641500551 is about 1879.7008493942.

The spelling of 6641500551 in words is "six billion, six hundred forty-one million, five hundred thousand, five hundred fifty-one".