666875546 has 8 divisors (see below), whose sum is σ = 1016712084. Its totient is φ = 327971520.

The previous prime is 666875497. The next prime is 666875549. The reversal of 666875546 is 645578666.

It can be written as a sum of positive squares in 2 ways, for example, as 664350625 + 2524921 = 25775^2 + 1589^2 .

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 (666875549) 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, 2732975 + ... + 2733218.

Almost surely, 2^666875546 is an apocalyptic number.

666875546 is a deficient number, since it is larger than the sum of its proper divisors (349836538).

666875546 is a wasteful number, since it uses less digits than its factorization.

666875546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5466256.

The product of its digits is 7257600, while the sum is 53.

The square root of 666875546 is about 25823.9335888241. The cubic root of 666875546 is about 873.6716916618.

The spelling of 666875546 in words is "six hundred sixty-six million, eight hundred seventy-five thousand, five hundred forty-six".