667071234 has 64 divisors (see below), whose sum is σ = 1513831680. Its totient is φ = 217676160.

The previous prime is 667071203. The next prime is 667071241. The reversal of 667071234 is 432170766.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1030699 + ... + 1031345.

It is an arithmetic number, because the mean of its divisors is an integer number (23653620).

Almost surely, 2^667071234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667071234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756915840).

667071234 is an abundant number, since it is smaller than the sum of its proper divisors (846760446).

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

667071234 is a wasteful number, since it uses less digits than its factorization.

667071234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1026 counting only the distinct ones).

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

The square root of 667071234 is about 25827.7221992184. The cubic root of 667071234 is about 873.7571400621.

The spelling of 667071234 in words is "six hundred sixty-seven million, seventy-one thousand, two hundred thirty-four".