16158661 has 8 divisors (see below), whose sum is σ = 16426944. Its totient is φ = 15892800.

The previous prime is 16158641. The next prime is 16158691. The reversal of 16158661 is 16685161.

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

It is a cyclic number.

It is not a de Polignac number, because 16158661 - 2²³ = 7770053 is a prime.

It is a super-2 number, since 2×16158661² = 522204650625842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16158641) 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, 16590 + ... + 17536.

It is an arithmetic number, because the mean of its divisors is an integer number (2053368).

Almost surely, 2^16158661 is an apocalyptic number.

It is an amenable number.

16158661 is a deficient number, since it is larger than the sum of its proper divisors (268283).

16158661 is a wasteful number, since it uses less digits than its factorization.

16158661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211.

The product of its digits is 8640, while the sum is 34.

The square root of 16158661 is about 4019.7837006486. The cubic root of 16158661 is about 252.8143899452.

The spelling of 16158661 in words is "sixteen million, one hundred fifty-eight thousand, six hundred sixty-one".