144666813 has 8 divisors (see below), whose sum is σ = 193436928. Its totient is φ = 96170624.

The previous prime is 144666727. The next prime is 144666829. The reversal of 144666813 is 318666441.

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 144666813 - 2¹² = 144662717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144666833) 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, 67245 + ... + 69362.

It is an arithmetic number, because the mean of its divisors is an integer number (24179616).

Almost surely, 2^144666813 is an apocalyptic number.

It is an amenable number.

144666813 is a deficient number, since it is larger than the sum of its proper divisors (48770115).

144666813 is a wasteful number, since it uses less digits than its factorization.

144666813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136963.

The product of its digits is 82944, while the sum is 39.

The square root of 144666813 is about 12027.7517849347. The cubic root of 144666813 is about 524.9560815869.

The spelling of 144666813 in words is "one hundred forty-four million, six hundred sixty-six thousand, eight hundred thirteen".