166736825 has 6 divisors (see below), whose sum is σ = 206753694. Its totient is φ = 133389440.

The previous prime is 166736813. The next prime is 166736827. The reversal of 166736825 is 528637661.

It can be written as a sum of positive squares in 3 ways, for example, as 46022656 + 120714169 = 6784^2 + 10987^2 .

It is not a de Polignac number, because 166736825 - 2¹⁶ = 166671289 is a prime.

It is a super-2 number, since 2×166736825² = 55602337622161250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166736827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3334712 + ... + 3334761.

It is an arithmetic number, because the mean of its divisors is an integer number (34458949).

Almost surely, 2^166736825 is an apocalyptic number.

It is an amenable number.

166736825 is a deficient number, since it is larger than the sum of its proper divisors (40016869).

166736825 is an equidigital number, since it uses as much as digits as its factorization.

166736825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669483 (or 6669478 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 166736825 is about 12912.6614220307. The cubic root of 166736825 is about 550.3984165540.

The spelling of 166736825 in words is "one hundred sixty-six million, seven hundred thirty-six thousand, eight hundred twenty-five".