6978755 has 32 divisors (see below), whose sum is σ = 10440576. Its totient is φ = 4368384.

The previous prime is 6978749. The next prime is 6978761. The reversal of 6978755 is 5578796.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6978749) and next prime (6978761).

It is a cyclic number.

It is not a de Polignac number, because 6978755 - 2⁴ = 6978739 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 9⁷ + 7⁴ + 8⁷ + 7⁵ + 5 + 5⁷ .

It is a Duffinian 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 31 ways as a sum of consecutive naturals, for example, 21857 + ... + 22173.

It is an arithmetic number, because the mean of its divisors is an integer number (326268).

Almost surely, 2^6978755 is an apocalyptic number.

6978755 is a deficient number, since it is larger than the sum of its proper divisors (3461821).

6978755 is a wasteful number, since it uses less digits than its factorization.

6978755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its digits is 529200, while the sum is 47.

The square root of 6978755 is about 2641.7333324921. The cubic root of 6978755 is about 191.0993972925.

The spelling of 6978755 in words is "six million, nine hundred seventy-eight thousand, seven hundred fifty-five".