668177387 has 8 divisors (see below), whose sum is σ = 687267504. Its totient is φ = 649248768.

The previous prime is 668177383. The next prime is 668177407. The reversal of 668177387 is 783771866.

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 668177387 - 2² = 668177383 is a prime.

It is a super-2 number, since 2×668177387² = 892922040996295538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668177383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31958 + ... + 48555.

It is an arithmetic number, because the mean of its divisors is an integer number (85908438).

Almost surely, 2^668177387 is an apocalyptic number.

668177387 is a deficient number, since it is larger than the sum of its proper divisors (19090117).

668177387 is a wasteful number, since it uses less digits than its factorization.

668177387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80749.

The product of its digits is 2370816, while the sum is 53.

The square root of 668177387 is about 25849.1273933957. The cubic root of 668177387 is about 874.2398348104.

The spelling of 668177387 in words is "six hundred sixty-eight million, one hundred seventy-seven thousand, three hundred eighty-seven".