667390123 has 8 divisors (see below), whose sum is σ = 685427760. Its totient is φ = 649576800.

The previous prime is 667390121. The next prime is 667390133. The reversal of 667390123 is 321093766.

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

It is a cyclic number.

It is not a de Polignac number, because 667390123 - 2¹ = 667390121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667390121) 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, 50040 + ... + 61957.

It is an arithmetic number, because the mean of its divisors is an integer number (85678470).

Almost surely, 2^667390123 is an apocalyptic number.

667390123 is a deficient number, since it is larger than the sum of its proper divisors (18037637).

667390123 is a wasteful number, since it uses less digits than its factorization.

667390123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112157.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 667390123 is about 25833.8948476609. The cubic root of 667390123 is about 873.8963491595.

The spelling of 667390123 in words is "six hundred sixty-seven million, three hundred ninety thousand, one hundred twenty-three".