166553433 has 12 divisors (see below), whose sum is σ = 243966528. Its totient is φ = 109471320.

The previous prime is 166553423. The next prime is 166553441. The reversal of 166553433 is 334355661.

166553433 is a `hidden beast` number, since 1 + 66 + 553 + 43 + 3 = 666.

It is not a de Polignac number, because 166553433 - 2¹⁰ = 166552409 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (166553423) 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, 129685 + ... + 130962.

It is an arithmetic number, because the mean of its divisors is an integer number (20330544).

Almost surely, 2^166553433 is an apocalyptic number.

It is an amenable number.

166553433 is a deficient number, since it is larger than the sum of its proper divisors (77413095).

166553433 is a wasteful number, since it uses less digits than its factorization.

166553433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260724 (or 260721 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 166553433 is about 12905.5582211697. The cubic root of 166553433 is about 550.1965501374.

The spelling of 166553433 in words is "one hundred sixty-six million, five hundred fifty-three thousand, four hundred thirty-three".