166557461 has 16 divisors (see below), whose sum is σ = 197028480. Its totient is φ = 137816640.

The previous prime is 166557437. The next prime is 166557463. The reversal of 166557461 is 164755661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166557461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166557463) 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 15 ways as a sum of consecutive naturals, for example, 31475 + ... + 36383.

It is an arithmetic number, because the mean of its divisors is an integer number (12314280).

Almost surely, 2^166557461 is an apocalyptic number.

It is an amenable number.

166557461 is a deficient number, since it is larger than the sum of its proper divisors (30471019).

166557461 is a wasteful number, since it uses less digits than its factorization.

166557461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084.

The product of its digits is 151200, while the sum is 41.

The square root of 166557461 is about 12905.7142770170. The cubic root of 166557461 is about 550.2009854985.

The spelling of 166557461 in words is "one hundred sixty-six million, five hundred fifty-seven thousand, four hundred sixty-one".