667661126 has 8 divisors (see below), whose sum is σ = 1092536424. Its totient is φ = 303482320.

The previous prime is 667661107. The next prime is 667661173. The reversal of 667661126 is 621166766.

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

It is a congruent number.

It is an unprimeable number.

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, 15174095 + ... + 15174138.

It is an arithmetic number, because the mean of its divisors is an integer number (136567053).

Almost surely, 2^667661126 is an apocalyptic number.

667661126 is a deficient number, since it is larger than the sum of its proper divisors (424875298).

667661126 is a wasteful number, since it uses less digits than its factorization.

667661126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30348246.

The product of its digits is 108864, while the sum is 41.

The square root of 667661126 is about 25839.1394206541. The cubic root of 667661126 is about 874.0146190567.

The spelling of 667661126 in words is "six hundred sixty-seven million, six hundred sixty-one thousand, one hundred twenty-six".