6866920 has 16 divisors (see below), whose sum is σ = 15450660. Its totient is φ = 2746752.

The previous prime is 6866887. The next prime is 6866927. The reversal of 6866920 is 296686.

It can be written as a sum of positive squares in 2 ways, for example, as 6853924 + 12996 = 2618^2 + 114^2 .

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6866920.

It is not an unprimeable number, because it can be changed into a prime (6866927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85797 + ... + 85876.

Almost surely, 2^6866920 is an apocalyptic number.

It is an amenable number.

6866920 is an abundant number, since it is smaller than the sum of its proper divisors (8583740).

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

6866920 is a wasteful number, since it uses less digits than its factorization.

6866920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171684 (or 171680 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 6866920 is about 2620.4808719012. The cubic root of 6866920 is about 190.0731020644.

The spelling of 6866920 in words is "six million, eight hundred sixty-six thousand, nine hundred twenty".