166001642 has 8 divisors (see below), whose sum is σ = 250090500. Its totient is φ = 82638144.

The previous prime is 166001639. The next prime is 166001653. The reversal of 166001642 is 246100661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 159037321 + 6964321 = 12611^2 + 2639^2 .

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, 180767 + ... + 181682.

Almost surely, 2^166001642 is an apocalyptic number.

166001642 is a deficient number, since it is larger than the sum of its proper divisors (84088858).

166001642 is a wasteful number, since it uses less digits than its factorization.

166001642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362680.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 166001642 is about 12884.1624485257. The cubic root of 166001642 is about 549.5882780938.

The spelling of 166001642 in words is "one hundred sixty-six million, one thousand, six hundred forty-two".