6477765221 has 8 divisors (see below), whose sum is σ = 6961181760. Its totient is φ = 6005723328.

The previous prime is 6477765139. The next prime is 6477765223. The reversal of 6477765221 is 1225677746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6477765221 is a prime.

It is a super-3 number, since 3×6477765221³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2842481 + ... + 2844758.

It is an arithmetic number, because the mean of its divisors is an integer number (870147720).

Almost surely, 2^6477765221 is an apocalyptic number.

It is an amenable number.

6477765221 is a deficient number, since it is larger than the sum of its proper divisors (483416539).

6477765221 is a wasteful number, since it uses less digits than its factorization.

6477765221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687323.

The product of its digits is 987840, while the sum is 47.

The square root of 6477765221 is about 80484.5651103365. The cubic root of 6477765221 is about 1864.1251586226.

The spelling of 6477765221 in words is "six billion, four hundred seventy-seven million, seven hundred sixty-five thousand, two hundred twenty-one".