6977640 has 32 divisors (see below), whose sum is σ = 20933280. Its totient is φ = 1860672.

The previous prime is 6977639. The next prime is 6977681. The reversal of 6977640 is 467796.

6977640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28954 + ... + 29193.

It is an arithmetic number, because the mean of its divisors is an integer number (654165).

Almost surely, 2^6977640 is an apocalyptic number.

6977640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6977640 is an abundant number, since it is smaller than the sum of its proper divisors (13955640).

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

6977640 is a wasteful number, since it uses less digits than its factorization.

6977640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58161 (or 58157 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 6977640 is about 2641.5222883784. The cubic root of 6977640 is about 191.0892193941.

The spelling of 6977640 in words is "six million, nine hundred seventy-seven thousand, six hundred forty".