158021966 has 8 divisors (see below), whose sum is σ = 237449784. Its totient is φ = 78872040.

The previous prime is 158021939. The next prime is 158021989. The reversal of 158021966 is 669120851.

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

It is a congruent number.

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, 68045 + ... + 70328.

It is an arithmetic number, because the mean of its divisors is an integer number (29681223).

Almost surely, 2^158021966 is an apocalyptic number.

158021966 is a deficient number, since it is larger than the sum of its proper divisors (79427818).

158021966 is a wasteful number, since it uses less digits than its factorization.

158021966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138946.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 158021966 is about 12570.6788201751. The cubic root of 158021966 is about 540.6370693331.

The spelling of 158021966 in words is "one hundred fifty-eight million, twenty-one thousand, nine hundred sixty-six".