158006661 has 16 divisors (see below), whose sum is σ = 219481920. Its totient is φ = 101022080.

The previous prime is 158006633. The next prime is 158006689. The reversal of 158006661 is 166600851.

It is an interprime number because it is at equal distance from previous prime (158006633) and next prime (158006689).

It is a cyclic number.

It is not a de Polignac number, because 158006661 - 2⁷ = 158006533 is a prime.

It is a super-2 number, since 2×158006661² = 49932209840737842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158006461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3630 + ... + 18143.

It is an arithmetic number, because the mean of its divisors is an integer number (13717620).

Almost surely, 2^158006661 is an apocalyptic number.

It is an amenable number.

158006661 is a deficient number, since it is larger than the sum of its proper divisors (61475259).

158006661 is a wasteful number, since it uses less digits than its factorization.

158006661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21876.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 158006661 is about 12570.0700475375. The cubic root of 158006661 is about 540.6196145498.

The spelling of 158006661 in words is "one hundred fifty-eight million, six thousand, six hundred sixty-one".