166187469 has 12 divisors (see below), whose sum is σ = 257760384. Its totient is φ = 94964184.

The previous prime is 166187467. The next prime is 166187477. The reversal of 166187469 is 964781661.

It is a happy number.

It is not a de Polignac number, because 166187469 - 2¹ = 166187467 is a prime.

It is a super-2 number, since 2×166187469² = 55236549705251922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166187467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 565117 + ... + 565410.

It is an arithmetic number, because the mean of its divisors is an integer number (21480032).

Almost surely, 2^166187469 is an apocalyptic number.

It is an amenable number.

166187469 is a deficient number, since it is larger than the sum of its proper divisors (91572915).

166187469 is a wasteful number, since it uses less digits than its factorization.

166187469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130544 (or 1130537 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 166187469 is about 12891.3718819992. The cubic root of 166187469 is about 549.7932765805.

The spelling of 166187469 in words is "one hundred sixty-six million, one hundred eighty-seven thousand, four hundred sixty-nine".