667475737 has 4 divisors (see below), whose sum is σ = 673713936. Its totient is φ = 661237540.

The previous prime is 667475723. The next prime is 667475759. The reversal of 667475737 is 737574766.

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 not a de Polignac number, because 667475737 - 2¹⁵ = 667442969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667475537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3118939 + ... + 3119152.

It is an arithmetic number, because the mean of its divisors is an integer number (168428484).

Almost surely, 2^667475737 is an apocalyptic number.

It is an amenable number.

667475737 is a deficient number, since it is larger than the sum of its proper divisors (6238199).

667475737 is a wasteful number, since it uses less digits than its factorization.

667475737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238198.

The product of its digits is 5186160, while the sum is 52.

The square root of 667475737 is about 25835.5518036678. The cubic root of 667475737 is about 873.9337158912.

The spelling of 667475737 in words is "six hundred sixty-seven million, four hundred seventy-five thousand, seven hundred thirty-seven".