166663745 has 8 divisors (see below), whose sum is σ = 202736616. Its totient is φ = 131504256.

The previous prime is 166663741. The next prime is 166663769. The reversal of 166663745 is 547366661.

166663745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 40056241 + 126607504 = 6329^2 + 11252^2 .

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 166663745 - 2² = 166663741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166663696 and 166663705.

It is not an unprimeable number, because it can be changed into a prime (166663741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227942 + ... + 228671.

It is an arithmetic number, because the mean of its divisors is an integer number (25342077).

Almost surely, 2^166663745 is an apocalyptic number.

It is an amenable number.

166663745 is a deficient number, since it is larger than the sum of its proper divisors (36072871).

166663745 is an equidigital number, since it uses as much as digits as its factorization.

166663745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456691.

The product of its digits is 544320, while the sum is 44.

The square root of 166663745 is about 12909.8313311987. The cubic root of 166663745 is about 550.3179924201.

The spelling of 166663745 in words is "one hundred sixty-six million, six hundred sixty-three thousand, seven hundred forty-five".