668570855 has 8 divisors (see below), whose sum is σ = 803628000. Its totient is φ = 533961376.

The previous prime is 668570839. The next prime is 668570857. The reversal of 668570855 is 558075866.

668570855 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 668570855 - 2⁴ = 668570839 is a prime.

It is a super-3 number, since 3×668570855³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668570857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108620 + ... + 114609.

It is an arithmetic number, because the mean of its divisors is an integer number (100453500).

Almost surely, 2^668570855 is an apocalyptic number.

668570855 is a deficient number, since it is larger than the sum of its proper divisors (135057145).

668570855 is a wasteful number, since it uses less digits than its factorization.

668570855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223833.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The square root of 668570855 is about 25856.7371298082. The cubic root of 668570855 is about 874.4114049690.

The spelling of 668570855 in words is "six hundred sixty-eight million, five hundred seventy thousand, eight hundred fifty-five".