6666973394 has 8 divisors (see below), whose sum is σ = 10008034428. Its totient is φ = 3330961920.

The previous prime is 6666973381. The next prime is 6666973433. The reversal of 6666973394 is 4933796666.

It can be written as a sum of positive squares in 2 ways, for example, as 6599125225 + 67848169 = 81235^2 + 8237^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259087 + ... + 1264370.

Almost surely, 2^6666973394 is an apocalyptic number.

6666973394 is a deficient number, since it is larger than the sum of its proper divisors (3341061034).

6666973394 is a wasteful number, since it uses less digits than its factorization.

6666973394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524780.

The product of its digits is 26453952, while the sum is 59.

The square root of 6666973394 is about 81651.5363848103. The cubic root of 6666973394 is about 1882.1009214666.

The spelling of 6666973394 in words is "six billion, six hundred sixty-six million, nine hundred seventy-three thousand, three hundred ninety-four".