66489429 has 4 divisors (see below), whose sum is σ = 88652576. Its totient is φ = 44326284.

The previous prime is 66489421. The next prime is 66489503. The reversal of 66489429 is 92498466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66489429 - 2³ = 66489421 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 (66489421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11081569 + ... + 11081574.

It is an arithmetic number, because the mean of its divisors is an integer number (22163144).

Almost surely, 2^66489429 is an apocalyptic number.

It is an amenable number.

66489429 is a deficient number, since it is larger than the sum of its proper divisors (22163147).

66489429 is a wasteful number, since it uses less digits than its factorization.

66489429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22163146.

The product of its digits is 746496, while the sum is 48.

The square root of 66489429 is about 8154.1050397944. The cubic root of 66489429 is about 405.1204823682.

The spelling of 66489429 in words is "sixty-six million, four hundred eighty-nine thousand, four hundred twenty-nine".