660171842 has 32 divisors (see below), whose sum is σ = 1093042944. Its totient is φ = 296557200.

The previous prime is 660171833. The next prime is 660171851. The reversal of 660171842 is 248171066.

It is an interprime number because it is at equal distance from previous prime (660171833) and next prime (660171851).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813617 + ... + 814427.

It is an arithmetic number, because the mean of its divisors is an integer number (34157592).

Almost surely, 2^660171842 is an apocalyptic number.

660171842 is a deficient number, since it is larger than the sum of its proper divisors (432871102).

660171842 is a wasteful number, since it uses less digits than its factorization.

660171842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 660171842 is about 25693.8094100505. The cubic root of 660171842 is about 870.7343260674.

The spelling of 660171842 in words is "six hundred sixty million, one hundred seventy-one thousand, eight hundred forty-two".