166142787 has 8 divisors (see below), whose sum is σ = 221641920. Its totient is φ = 110702760.

The previous prime is 166142773. The next prime is 166142831. The reversal of 166142787 is 787241661.

166142787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166142787 - 2⁴ = 166142771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166142287) 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, 7737 + ... + 19802.

It is an arithmetic number, because the mean of its divisors is an integer number (27705240).

Almost surely, 2^166142787 is an apocalyptic number.

166142787 is a deficient number, since it is larger than the sum of its proper divisors (55499133).

166142787 is a wasteful number, since it uses less digits than its factorization.

166142787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29553.

The product of its digits is 112896, while the sum is 42.

The square root of 166142787 is about 12889.6387459075. The cubic root of 166142787 is about 549.7439987673.

The spelling of 166142787 in words is "one hundred sixty-six million, one hundred forty-two thousand, seven hundred eighty-seven".