146666681 has 8 divisors (see below), whose sum is σ = 176441280. Its totient is φ = 119097648.

The previous prime is 146666677. The next prime is 146666687. The reversal of 146666681 is 186666641.

It is a happy number.

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 146666681 - 2² = 146666677 is a prime.

It is a super-2 number, since 2×146666681² = 43022230631111522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146666687) 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, 551246 + ... + 551511.

It is an arithmetic number, because the mean of its divisors is an integer number (22055160).

Almost surely, 2^146666681 is an apocalyptic number.

It is an amenable number.

146666681 is a deficient number, since it is larger than the sum of its proper divisors (29774599).

146666681 is a wasteful number, since it uses less digits than its factorization.

146666681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102783.

The product of its digits is 248832, while the sum is 44.

The square root of 146666681 is about 12110.6020081580. The cubic root of 146666681 is about 527.3640100770.

The spelling of 146666681 in words is "one hundred forty-six million, six hundred sixty-six thousand, six hundred eighty-one".