667717377 has 8 divisors (see below), whose sum is σ = 903578016. Its totient is φ = 438500832.

The previous prime is 667717331. The next prime is 667717387. The reversal of 667717377 is 773717766.

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

It is not a de Polignac number, because 667717377 - 2⁸ = 667717121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667717387) 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, 1660788 + ... + 1661189.

It is an arithmetic number, because the mean of its divisors is an integer number (112947252).

Almost surely, 2^667717377 is an apocalyptic number.

667717377 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

667717377 is a deficient number, since it is larger than the sum of its proper divisors (235860639).

667717377 is a wasteful number, since it uses less digits than its factorization.

667717377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322047.

The product of its digits is 1815156, while the sum is 51.

The square root of 667717377 is about 25840.2278821221. The cubic root of 667717377 is about 874.0391638513.

The spelling of 667717377 in words is "six hundred sixty-seven million, seven hundred seventeen thousand, three hundred seventy-seven".