1667920123 has 8 divisors (see below), whose sum is σ = 1757991600. Its totient is φ = 1580019168.

The previous prime is 1667920091. The next prime is 1667920129. The reversal of 1667920123 is 3210297661.

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 1667920123 - 2⁵ = 1667920091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1667920129) 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, 541053 + ... + 544126.

It is an arithmetic number, because the mean of its divisors is an integer number (219748950).

Almost surely, 2^1667920123 is an apocalyptic number.

1667920123 is a deficient number, since it is larger than the sum of its proper divisors (90071477).

1667920123 is a wasteful number, since it uses less digits than its factorization.

1667920123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085261.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1667920123 is about 40840.1778032369. The cubic root of 1667920123 is about 1185.9282543781.

The spelling of 1667920123 in words is "one billion, six hundred sixty-seven million, nine hundred twenty thousand, one hundred twenty-three".