166087593 has 12 divisors (see below), whose sum is σ = 274176448. Its totient is φ = 94907160.

The previous prime is 166087583. The next prime is 166087633. The reversal of 166087593 is 395780661.

It is a happy number.

It is not a de Polignac number, because 166087593 - 2⁶ = 166087529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166087583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1318093 + ... + 1318218.

Almost surely, 2^166087593 is an apocalyptic number.

It is an amenable number.

166087593 is a deficient number, since it is larger than the sum of its proper divisors (108088855).

166087593 is a wasteful number, since it uses less digits than its factorization.

166087593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636324 (or 2636321 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 166087593 is about 12887.4975460715. The cubic root of 166087593 is about 549.6831155326.

It can be divided in two parts, 1660 and 87593, that added together give a triangular number (89253 = T₄₂₂).

The spelling of 166087593 in words is "one hundred sixty-six million, eighty-seven thousand, five hundred ninety-three".