668556095 has 4 divisors (see below), whose sum is σ = 802267320. Its totient is φ = 534844872.

The previous prime is 668556079. The next prime is 668556103. The reversal of 668556095 is 590655866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 590655866 = 2 ⋅295327933.

It is a cyclic number.

It is not a de Polignac number, because 668556095 - 2⁴ = 668556079 is a prime.

It is a congruent number.

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, 66855605 + ... + 66855614.

It is an arithmetic number, because the mean of its divisors is an integer number (200566830).

Almost surely, 2^668556095 is an apocalyptic number.

668556095 is a deficient number, since it is larger than the sum of its proper divisors (133711225).

668556095 is a wasteful number, since it uses less digits than its factorization.

668556095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133711224.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The square root of 668556095 is about 25856.4517093897. The cubic root of 668556095 is about 874.4049701450.

The spelling of 668556095 in words is "six hundred sixty-eight million, five hundred fifty-six thousand, ninety-five".