6642561046 has 32 divisors (see below), whose sum is σ = 11349393408. Its totient is φ = 2886248640.

The previous prime is 6642560999. The next prime is 6642561061. The reversal of 6642561046 is 6401652466.

It is a super-2 number, since 2×6642561046² = 88247234499673228232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1078251 + ... + 1084393.

It is an arithmetic number, because the mean of its divisors is an integer number (354668544).

Almost surely, 2^6642561046 is an apocalyptic number.

6642561046 is a deficient number, since it is larger than the sum of its proper divisors (4706832362).

6642561046 is a wasteful number, since it uses less digits than its factorization.

6642561046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 6642561046 is about 81501.9082353291. The cubic root of 6642561046 is about 1879.8008924114.

The spelling of 6642561046 in words is "six billion, six hundred forty-two million, five hundred sixty-one thousand, forty-six".