6776209440 has 768 divisors, whose sum is σ = 31863767040. Its totient is φ = 1298903040.

The previous prime is 6776209417. The next prime is 6776209459. The reversal of 6776209440 is 449026776.

It is a super-2 number, since 2×6776209440² = 91834028749490227200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4323537 + ... + 4325103.

It is an arithmetic number, because the mean of its divisors is an integer number (41489280).

Almost surely, 2^6776209440 is an apocalyptic number.

6776209440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6776209440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15931883520).

6776209440 is an abundant number, since it is smaller than the sum of its proper divisors (25087557600).

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

6776209440 is a wasteful number, since it uses less digits than its factorization.

6776209440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 6776209440 is about 82317.7346627080. The cubic root of 6776209440 is about 1892.3244768566.

The spelling of 6776209440 in words is "six billion, seven hundred seventy-six million, two hundred nine thousand, four hundred forty".