6643577070 has 80 divisors (see below), whose sum is σ = 19238012640. Its totient is φ = 1635339456.

The previous prime is 6643577053. The next prime is 6643577077. The reversal of 6643577070 is 707753466.

6643577070 is a `hidden beast` number, since 6 + 6 + 4 + 3 + 577 + 0 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643577077) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 304930 + ... + 325989.

It is an arithmetic number, because the mean of its divisors is an integer number (240475158).

Almost surely, 2^6643577070 is an apocalyptic number.

6643577070 is an abundant number, since it is smaller than the sum of its proper divisors (12594435570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6643577070 is a wasteful number, since it uses less digits than its factorization.

6643577070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630951 (or 630942 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 45.

The square root of 6643577070 is about 81508.1411271291. The cubic root of 6643577070 is about 1879.8967302185.

The spelling of 6643577070 in words is "six billion, six hundred forty-three million, five hundred seventy-seven thousand, seventy".