146066881 has 4 divisors (see below), whose sum is σ = 151103700. Its totient is φ = 141030064.

The previous prime is 146066849. The next prime is 146066897. The reversal of 146066881 is 188660641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188660641 = 13 ⋅14512357.

It can be written as a sum of positive squares in 2 ways, for example, as 34574400 + 111492481 = 5880^2 + 10559^2 .

It is a cyclic number.

It is not a de Polignac number, because 146066881 - 2⁵ = 146066849 is a prime.

It is a super-2 number, since 2×146066881² = 42671067450136322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146066801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2518366 + ... + 2518423.

It is an arithmetic number, because the mean of its divisors is an integer number (37775925).

Almost surely, 2^146066881 is an apocalyptic number.

It is an amenable number.

146066881 is a deficient number, since it is larger than the sum of its proper divisors (5036819).

146066881 is an equidigital number, since it uses as much as digits as its factorization.

146066881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036818.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 146066881 is about 12085.8132121922. The cubic root of 146066881 is about 526.6441349028.

The spelling of 146066881 in words is "one hundred forty-six million, sixty-six thousand, eight hundred eighty-one".