6662978 has 8 divisors (see below), whose sum is σ = 11422272. Its totient is φ = 2855556.

The previous prime is 6662959. The next prime is 6662987. The reversal of 6662978 is 8792666.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 237950 + ... + 237977.

It is an arithmetic number, because the mean of its divisors is an integer number (1427784).

Almost surely, 2^6662978 is an apocalyptic number.

6662978 is a deficient number, since it is larger than the sum of its proper divisors (4759294).

6662978 is a wasteful number, since it uses less digits than its factorization.

6662978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475936.

The product of its digits is 217728, while the sum is 44.

The square root of 6662978 is about 2581.2744914092. The cubic root of 6662978 is about 188.1724876899.

The spelling of 6662978 in words is "six million, six hundred sixty-two thousand, nine hundred seventy-eight".