166461471 has 24 divisors (see below), whose sum is σ = 268409856. Its totient is φ = 98537040.

The previous prime is 166461469. The next prime is 166461509. The reversal of 166461471 is 174164661.

It is a happy number.

166461471 is a `hidden beast` number, since 1 + 6 + 646 + 1 + 4 + 7 + 1 = 666.

It is not a de Polignac number, because 166461471 - 2¹ = 166461469 is a prime.

It is a super-3 number, since 3×166461471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166461401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15295 + ... + 23808.

It is an arithmetic number, because the mean of its divisors is an integer number (11183744).

Almost surely, 2^166461471 is an apocalyptic number.

166461471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166461471 is a deficient number, since it is larger than the sum of its proper divisors (101948385).

166461471 is a wasteful number, since it uses less digits than its factorization.

166461471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39163 (or 39160 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 166461471 is about 12901.9948457593. The cubic root of 166461471 is about 550.0952683456.

The spelling of 166461471 in words is "one hundred sixty-six million, four hundred sixty-one thousand, four hundred seventy-one".