166252155 has 8 divisors (see below), whose sum is σ = 266003472. Its totient is φ = 88667808.

The previous prime is 166252153. The next prime is 166252159. The reversal of 166252155 is 551252661.

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

It is not a de Polignac number, because 166252155 - 2¹ = 166252153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166252153) 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 7 ways as a sum of consecutive naturals, for example, 5541724 + ... + 5541753.

It is an arithmetic number, because the mean of its divisors is an integer number (33250434).

Almost surely, 2^166252155 is an apocalyptic number.

166252155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166252155 is a deficient number, since it is larger than the sum of its proper divisors (99751317).

166252155 is a wasteful number, since it uses less digits than its factorization.

166252155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11083485.

The product of its digits is 18000, while the sum is 33.

The square root of 166252155 is about 12893.8805252724. The cubic root of 166252155 is about 549.8646002787.

It can be divided in two parts, 1662521 and 55, that added together give a triangular number (1662576 = T₁₈₂₃).

The spelling of 166252155 in words is "one hundred sixty-six million, two hundred fifty-two thousand, one hundred fifty-five".