667007070 has 64 divisors (see below), whose sum is σ = 1699258176. Its totient is φ = 166983680.

The previous prime is 667007063. The next prime is 667007093. The reversal of 667007070 is 70700766.

It is a happy number.

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, 233692 + ... + 236528.

It is an arithmetic number, because the mean of its divisors is an integer number (26550909).

Almost surely, 2^667007070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667007070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849629088).

667007070 is an abundant number, since it is smaller than the sum of its proper divisors (1032251106).

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

667007070 is a wasteful number, since it uses less digits than its factorization.

667007070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325.

The product of its (nonzero) digits is 12348, while the sum is 33.

The square root of 667007070 is about 25826.4800156738. The cubic root of 667007070 is about 873.7291242881.

The spelling of 667007070 in words is "six hundred sixty-seven million, seven thousand, seventy".