6801666 has 16 divisors (see below), whose sum is σ = 14403744. Its totient is φ = 2133824.

The previous prime is 6801653. The next prime is 6801703. The reversal of 6801666 is 6661086.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33240 + ... + 33443.

It is an arithmetic number, because the mean of its divisors is an integer number (900234).

Almost surely, 2^6801666 is an apocalyptic number.

6801666 is an abundant number, since it is smaller than the sum of its proper divisors (7602078).

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

6801666 is a wasteful number, since it uses less digits than its factorization.

6801666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66705.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6801666 is about 2608.0003834356. Note that the first 3 decimals coincide. The cubic root of 6801666 is about 189.4691182217.

It can be divided in two parts, 680 and 1666, that added together give a triangular number (2346 = T₆₈).

The spelling of 6801666 in words is "six million, eight hundred one thousand, six hundred sixty-six".