6477765220 has 12 divisors (see below), whose sum is σ = 13603307004. Its totient is φ = 2591106080.

The previous prime is 6477765139. The next prime is 6477765223. The reversal of 6477765220 is 225677746.

It can be written as a sum of positive squares in 2 ways, for example, as 1410603364 + 5067161856 = 37558^2 + 71184^2 .

It is a super-2 number, since 2×6477765220² = 83922884490883296800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6477765223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161944111 + ... + 161944150.

It is an arithmetic number, because the mean of its divisors is an integer number (1133608917).

Almost surely, 2^6477765220 is an apocalyptic number.

It is an amenable number.

6477765220 is an abundant number, since it is smaller than the sum of its proper divisors (7125541784).

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

6477765220 is a wasteful number, since it uses less digits than its factorization.

6477765220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323888270 (or 323888268 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 46.

The square root of 6477765220 is about 80484.5651041242. The cubic root of 6477765220 is about 1864.1251585267.

The spelling of 6477765220 in words is "six billion, four hundred seventy-seven million, seven hundred sixty-five thousand, two hundred twenty".