667216076578 has 16 divisors (see below), whose sum is σ = 1007195472000. Its totient is φ = 331490798352.

The previous prime is 667216076543. The next prime is 667216076587. The reversal of 667216076578 is 875670612766.

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, 1432218 + ... + 1840021.

It is an arithmetic number, because the mean of its divisors is an integer number (62949717000).

Almost surely, 2^667216076578 is an apocalyptic number.

667216076578 is a deficient number, since it is larger than the sum of its proper divisors (339979395422).

667216076578 is a wasteful number, since it uses less digits than its factorization.

667216076578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272889.

The product of its (nonzero) digits is 35562240, while the sum is 61.

The spelling of 667216076578 in words is "six hundred sixty-seven billion, two hundred sixteen million, seventy-six thousand, five hundred seventy-eight".