166557455 has 8 divisors (see below), whose sum is σ = 200101104. Its totient is φ = 133091200.

The previous prime is 166557437. The next prime is 166557463. The reversal of 166557455 is 554755661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166557455 - 2¹⁰ = 166556431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14501 + ... + 23310.

It is an arithmetic number, because the mean of its divisors is an integer number (25012638).

Almost surely, 2^166557455 is an apocalyptic number.

166557455 is a deficient number, since it is larger than the sum of its proper divisors (33543649).

166557455 is an equidigital number, since it uses as much as digits as its factorization.

166557455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38697.

The product of its digits is 630000, while the sum is 44.

The square root of 166557455 is about 12905.7140445618. The cubic root of 166557455 is about 550.2009788917.

The spelling of 166557455 in words is "one hundred sixty-six million, five hundred fifty-seven thousand, four hundred fifty-five".