170987666 has 16 divisors (see below), whose sum is σ = 272182680. Its totient is φ = 80282880.

The previous prime is 170987633. The next prime is 170987689. The reversal of 170987666 is 666789071.

It can be written as a sum of positive squares in 4 ways, for example, as 135047641 + 35940025 = 11621^2 + 5995^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10220 + ... + 21128.

Almost surely, 2^170987666 is an apocalyptic number.

170987666 is a deficient number, since it is larger than the sum of its proper divisors (101195014).

170987666 is a wasteful number, since it uses less digits than its factorization.

170987666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11389.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 170987666 is about 13076.2252198408. The cubic root of 170987666 is about 555.0365649691.

The spelling of 170987666 in words is "one hundred seventy million, nine hundred eighty-seven thousand, six hundred sixty-six".