166000555 has 8 divisors (see below), whose sum is σ = 227657952. Its totient is φ = 113828928.

The previous prime is 166000547. The next prime is 166000561. The reversal of 166000555 is 555000661.

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

It is a cyclic number.

It is not a de Polignac number, because 166000555 - 2³ = 166000547 is a prime.

It is a Duffinian 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, 2371402 + ... + 2371471.

It is an arithmetic number, because the mean of its divisors is an integer number (28457244).

Almost surely, 2^166000555 is an apocalyptic number.

166000555 is a deficient number, since it is larger than the sum of its proper divisors (61657397).

166000555 is an equidigital number, since it uses as much as digits as its factorization.

166000555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4742885.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 166000555 is about 12884.1202648842. The cubic root of 166000555 is about 549.5870784998.

The spelling of 166000555 in words is "one hundred sixty-six million, five hundred fifty-five", and thus it is an aban number.