158978066 has 8 divisors (see below), whose sum is σ = 256810764. Its totient is φ = 73374480.

The previous prime is 158978023. The next prime is 158978077. The reversal of 158978066 is 660879851.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 156975841 + 2002225 = 12529^2 + 1415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3057245 + ... + 3057296.

Almost surely, 2^158978066 is an apocalyptic number.

158978066 is a deficient number, since it is larger than the sum of its proper divisors (97832698).

158978066 is a wasteful number, since it uses less digits than its factorization.

158978066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114556.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 158978066 is about 12608.6504432473. The cubic root of 158978066 is about 541.7252389311.

The spelling of 158978066 in words is "one hundred fifty-eight million, nine hundred seventy-eight thousand, sixty-six".