667321470 has 64 divisors (see below), whose sum is σ = 1803954240. Its totient is φ = 175509504.

The previous prime is 667321423. The next prime is 667321489. The reversal of 667321470 is 74123766.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2782 + ... + 36638.

It is an arithmetic number, because the mean of its divisors is an integer number (28186785).

Almost surely, 2^667321470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667321470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901977120).

667321470 is an abundant number, since it is smaller than the sum of its proper divisors (1136632770).

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

667321470 is a wasteful number, since it uses less digits than its factorization.

667321470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33946 (or 33940 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 667321470 is about 25832.5660746276. The cubic root of 667321470 is about 873.8663828468.

The spelling of 667321470 in words is "six hundred sixty-seven million, three hundred twenty-one thousand, four hundred seventy".