158715866 has 16 divisors (see below), whose sum is σ = 245797224. Its totient is φ = 76806144.

The previous prime is 158715863. The next prime is 158715901. The reversal of 158715866 is 668517851.

It is a happy number.

158715866 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 4 ways, for example, as 99102025 + 59613841 = 9955^2 + 7721^2 .

It is a super-2 number, since 2×158715866² = 50381452240259912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 158715866.

It is not an unprimeable number, because it can be changed into a prime (158715863) 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, 8726 + ... + 19838.

Almost surely, 2^158715866 is an apocalyptic number.

158715866 is a deficient number, since it is larger than the sum of its proper divisors (87081358).

158715866 is a wasteful number, since it uses less digits than its factorization.

158715866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11345.

The product of its digits is 403200, while the sum is 47.

The square root of 158715866 is about 12598.2485290615. The cubic root of 158715866 is about 541.4272554395.

The spelling of 158715866 in words is "one hundred fifty-eight million, seven hundred fifteen thousand, eight hundred sixty-six".