168076666 has 4 divisors (see below), whose sum is σ = 252115002. Its totient is φ = 84038332.

The previous prime is 168076651. The next prime is 168076729. The reversal of 168076666 is 666670861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666670861 = 17 ⋅39215933.

It can be written as a sum of positive squares in only one way, i.e., 121550625 + 46526041 = 11025^2 + 6821^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42019165 + ... + 42019168.

Almost surely, 2^168076666 is an apocalyptic number.

168076666 is a deficient number, since it is larger than the sum of its proper divisors (84038336).

168076666 is an equidigital number, since it uses as much as digits as its factorization.

168076666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84038335.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 168076666 is about 12964.4385146446. The cubic root of 168076666 is about 551.8687573057.

The spelling of 168076666 in words is "one hundred sixty-eight million, seventy-six thousand, six hundred sixty-six".