156668386 has 24 divisors (see below), whose sum is σ = 276205356. Its totient is φ = 66447360.

The previous prime is 156668383. The next prime is 156668401. The reversal of 156668386 is 683866651.

It can be written as a sum of positive squares in 2 ways, for example, as 155775361 + 893025 = 12481^2 + 945^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (156668381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1266 + ... + 17746.

Almost surely, 2^156668386 is an apocalyptic number.

156668386 is a deficient number, since it is larger than the sum of its proper divisors (119536970).

156668386 is a wasteful number, since it uses less digits than its factorization.

156668386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16594 (or 16587 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 156668386 is about 12516.7242519758. The cubic root of 156668386 is about 539.0889828916.

The spelling of 156668386 in words is "one hundred fifty-six million, six hundred sixty-eight thousand, three hundred eighty-six".