667142637 has 8 divisors (see below), whose sum is σ = 1016598336. Its totient is φ = 381224352.

The previous prime is 667142627. The next prime is 667142647. The reversal of 667142637 is 736241766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (667142627) and next prime (667142647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667142637 - 2⁸ = 667142381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667142617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15884328 + ... + 15884369.

It is an arithmetic number, because the mean of its divisors is an integer number (127074792).

Almost surely, 2^667142637 is an apocalyptic number.

It is an amenable number.

667142637 is a deficient number, since it is larger than the sum of its proper divisors (349455699).

667142637 is a wasteful number, since it uses less digits than its factorization.

667142637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31768707.

The product of its digits is 254016, while the sum is 42.

The square root of 667142637 is about 25829.1044560202. The cubic root of 667142637 is about 873.7883144715.

The spelling of 667142637 in words is "six hundred sixty-seven million, one hundred forty-two thousand, six hundred thirty-seven".