6866742578 has 8 divisors (see below), whose sum is σ = 10906002972. Its totient is φ = 3231408256.

The previous prime is 6866742577. The next prime is 6866742599. The reversal of 6866742578 is 8752476686.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6854680849 + 12061729 = 82793^2 + 3473^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6866742577) 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, 100981475 + ... + 100981542.

Almost surely, 2^6866742578 is an apocalyptic number.

6866742578 is a deficient number, since it is larger than the sum of its proper divisors (4039260394).

6866742578 is a wasteful number, since it uses less digits than its factorization.

6866742578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201963036.

The product of its digits is 27095040, while the sum is 59.

The square root of 6866742578 is about 82865.8106700224. The cubic root of 6866742578 is about 1900.7146506463.

The spelling of 6866742578 in words is "six billion, eight hundred sixty-six million, seven hundred forty-two thousand, five hundred seventy-eight".