667070437 has 4 divisors (see below), whose sum is σ = 727713216. Its totient is φ = 606427660.

The previous prime is 667070413. The next prime is 667070477. The reversal of 667070437 is 734070766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667070437 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667070437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667070477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30321373 + ... + 30321394.

It is an arithmetic number, because the mean of its divisors is an integer number (181928304).

Almost surely, 2^667070437 is an apocalyptic number.

It is an amenable number.

667070437 is a deficient number, since it is larger than the sum of its proper divisors (60642779).

667070437 is a wasteful number, since it uses less digits than its factorization.

667070437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60642778.

The product of its (nonzero) digits is 148176, while the sum is 40.

The square root of 667070437 is about 25827.7067700561. The cubic root of 667070437 is about 873.7567920809.

The spelling of 667070437 in words is "six hundred sixty-seven million, seventy thousand, four hundred thirty-seven".