667589197 has 8 divisors (see below), whose sum is σ = 734725440. Its totient is φ = 601527360.

The previous prime is 667589177. The next prime is 667589207. The reversal of 667589197 is 791985766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667589197 is a prime.

It is a super-2 number, since 2×667589197² = 891350671902209618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667589137) 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, 267297 + ... + 269782.

It is an arithmetic number, because the mean of its divisors is an integer number (91840680).

Almost surely, 2^667589197 is an apocalyptic number.

It is an amenable number.

667589197 is a deficient number, since it is larger than the sum of its proper divisors (67136243).

667589197 is a wasteful number, since it uses less digits than its factorization.

667589197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537203.

The product of its digits is 5715360, while the sum is 58.

The square root of 667589197 is about 25837.7475217945. The cubic root of 667589197 is about 873.9832312499.

The spelling of 667589197 in words is "six hundred sixty-seven million, five hundred eighty-nine thousand, one hundred ninety-seven".