66423149 has 8 divisors (see below), whose sum is σ = 74643072. Its totient is φ = 58647600.

The previous prime is 66423143. The next prime is 66423163. The reversal of 66423149 is 94132466.

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 66423149 - 2¹² = 66419053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66423143) 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, 110777 + ... + 111374.

It is an arithmetic number, because the mean of its divisors is an integer number (9330384).

Almost surely, 2^66423149 is an apocalyptic number.

It is an amenable number.

66423149 is a deficient number, since it is larger than the sum of its proper divisors (8219923).

66423149 is a wasteful number, since it uses less digits than its factorization.

66423149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222187.

The product of its digits is 31104, while the sum is 35.

The square root of 66423149 is about 8150.0398158537. The cubic root of 66423149 is about 404.9858228030.

The spelling of 66423149 in words is "sixty-six million, four hundred twenty-three thousand, one hundred forty-nine".