15668345 has 16 divisors (see below), whose sum is σ = 23442048. Its totient is φ = 9767040.

The previous prime is 15668311. The next prime is 15668347. The reversal of 15668345 is 54386651.

It is not a de Polignac number, because 15668345 - 2⁶ = 15668281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15668299 and 15668308.

It is not an unprimeable number, because it can be changed into a prime (15668347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19964 + ... + 20733.

It is an arithmetic number, because the mean of its divisors is an integer number (1465128).

Almost surely, 2^15668345 is an apocalyptic number.

It is an amenable number.

15668345 is a deficient number, since it is larger than the sum of its proper divisors (7773703).

15668345 is a wasteful number, since it uses less digits than its factorization.

15668345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40720.

The product of its digits is 86400, while the sum is 38.

The square root of 15668345 is about 3958.3260350810. The cubic root of 15668345 is about 250.2309598977.

The spelling of 15668345 in words is "fifteen million, six hundred sixty-eight thousand, three hundred forty-five".