667348157 has 4 divisors (see below), whose sum is σ = 762683616. Its totient is φ = 572012700.

The previous prime is 667348147. The next prime is 667348177. The reversal of 667348157 is 751843766.

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, and also an emirpimes, since its reverse is a distinct semiprime: 751843766 = 2 ⋅375921883.

It is a de Polignac number, because none of the positive numbers 2^k-667348157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667348117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47667719 + ... + 47667732.

It is an arithmetic number, because the mean of its divisors is an integer number (190670904).

Almost surely, 2^667348157 is an apocalyptic number.

It is an amenable number.

667348157 is a deficient number, since it is larger than the sum of its proper divisors (95335459).

667348157 is an equidigital number, since it uses as much as digits as its factorization.

667348157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95335458.

The product of its digits is 846720, while the sum is 47.

The square root of 667348157 is about 25833.0826073854. The cubic root of 667348157 is about 873.8780316859.

The spelling of 667348157 in words is "six hundred sixty-seven million, three hundred forty-eight thousand, one hundred fifty-seven".