156668945 has 8 divisors (see below), whose sum is σ = 188070336. Its totient is φ = 125290096.

The previous prime is 156668921. The next prime is 156668951. The reversal of 156668945 is 549866651.

It is a happy number.

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 156668945 - 2²⁴ = 139891729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 156668893 and 156668902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21884 + ... + 28146.

It is an arithmetic number, because the mean of its divisors is an integer number (23508792).

Almost surely, 2^156668945 is an apocalyptic number.

It is an amenable number.

156668945 is a deficient number, since it is larger than the sum of its proper divisors (31401391).

156668945 is an equidigital number, since it uses as much as digits as its factorization.

156668945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11271.

The product of its digits is 1555200, while the sum is 50.

The square root of 156668945 is about 12516.7465820795. The cubic root of 156668945 is about 539.0896240556.

The spelling of 156668945 in words is "one hundred fifty-six million, six hundred sixty-eight thousand, nine hundred forty-five".