667923125 has 10 divisors (see below), whose sum is σ = 834637518. Its totient is φ = 534338000.

The previous prime is 667923107. The next prime is 667923127. The reversal of 667923125 is 521329766.

It can be written as a sum of positive squares in 5 ways, for example, as 255264529 + 412658596 = 15977^2 + 20314^2 .

It is not a de Polignac number, because 667923125 - 2¹² = 667919029 is a prime.

It is a super-2 number, since 2×667923125² = 892242601819531250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667923127) 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 9 ways as a sum of consecutive naturals, for example, 533714 + ... + 534963.

Almost surely, 2^667923125 is an apocalyptic number.

It is an amenable number.

667923125 is a deficient number, since it is larger than the sum of its proper divisors (166714393).

667923125 is an equidigital number, since it uses as much as digits as its factorization.

667923125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068697 (or 1068682 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 667923125 is about 25844.2087323253. The cubic root of 667923125 is about 874.1289290466.

The spelling of 667923125 in words is "six hundred sixty-seven million, nine hundred twenty-three thousand, one hundred twenty-five".