156726666 has 12 divisors (see below), whose sum is σ = 339574482. Its totient is φ = 52242216.

The previous prime is 156726653. The next prime is 156726667. The reversal of 156726666 is 666627651.

156726666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 126090441 + 30636225 = 11229^2 + 5535^2 .

It is not an unprimeable number, because it can be changed into a prime (156726667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4353501 + ... + 4353536.

Almost surely, 2^156726666 is an apocalyptic number.

156726666 is an abundant number, since it is smaller than the sum of its proper divisors (182847816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156726666 is a wasteful number, since it uses less digits than its factorization.

156726666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8707045 (or 8707042 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 156726666 is about 12519.0521206679. The cubic root of 156726666 is about 539.1558209048.

The spelling of 156726666 in words is "one hundred fifty-six million, seven hundred twenty-six thousand, six hundred sixty-six".