6778407982 has 16 divisors (see below), whose sum is σ = 10499432832. Its totient is φ = 3278676960.

The previous prime is 6778407959. The next prime is 6778408019. The reversal of 6778407982 is 2897048776.

It is a super-4 number, since 4×6778407982⁴ (a number of 40 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164848 + ... + 201820.

It is an arithmetic number, because the mean of its divisors is an integer number (656214552).

Almost surely, 2^6778407982 is an apocalyptic number.

6778407982 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6778407982 is a deficient number, since it is larger than the sum of its proper divisors (3721024850).

6778407982 is a wasteful number, since it uses less digits than its factorization.

6778407982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39963.

The product of its (nonzero) digits is 9483264, while the sum is 58.

The square root of 6778407982 is about 82331.0875793585. The cubic root of 6778407982 is about 1892.5291096981.

The spelling of 6778407982 in words is "six billion, seven hundred seventy-eight million, four hundred seven thousand, nine hundred eighty-two".