6642011377 has 16 divisors (see below), whose sum is σ = 6978857472. Its totient is φ = 6313930560.

The previous prime is 6642011371. The next prime is 6642011381. The reversal of 6642011377 is 7731102466.

It is a cyclic number.

It is not a de Polignac number, because 6642011377 - 2⁷ = 6642011249 is a prime.

It is a super-2 number, since 2×6642011377² = 88232630264394872258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6642011371) 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 15 ways as a sum of consecutive naturals, for example, 1094283 + ... + 1100335.

It is an arithmetic number, because the mean of its divisors is an integer number (436178592).

Almost surely, 2^6642011377 is an apocalyptic number.

It is an amenable number.

6642011377 is a deficient number, since it is larger than the sum of its proper divisors (336846095).

6642011377 is a wasteful number, since it uses less digits than its factorization.

6642011377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 6642011377 is about 81498.5360420664. The cubic root of 6642011377 is about 1879.7490400826.

The spelling of 6642011377 in words is "six billion, six hundred forty-two million, eleven thousand, three hundred seventy-seven".