667170216 has 64 divisors (see below), whose sum is σ = 1855742400. Its totient is φ = 222091200.

The previous prime is 667170211. The next prime is 667170227. The reversal of 667170216 is 612071766.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (667170211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208146 + ... + 211326.

It is an arithmetic number, because the mean of its divisors is an integer number (28995975).

Almost surely, 2^667170216 is an apocalyptic number.

It is an amenable number.

667170216 is an abundant number, since it is smaller than the sum of its proper divisors (1188572184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667170216 is a wasteful number, since it uses less digits than its factorization.

667170216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167 (or 4157 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 667170216 is about 25829.6383249940. The cubic root of 667170216 is about 873.8003548132.

The spelling of 667170216 in words is "six hundred sixty-seven million, one hundred seventy thousand, two hundred sixteen".