66603429 has 6 divisors (see below), whose sum is σ = 96204966. Its totient is φ = 44402280.

The previous prime is 66603403. The next prime is 66603451. The reversal of 66603429 is 92430666.

It can be written as a sum of positive squares in only one way, i.e., 58752225 + 7851204 = 7665^2 + 2802^2 .

It is not a de Polignac number, because 66603429 - 2⁷ = 66603301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66603393 and 66603402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66603479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3700182 + ... + 3700199.

It is an arithmetic number, because the mean of its divisors is an integer number (16034161).

Almost surely, 2^66603429 is an apocalyptic number.

It is an amenable number.

66603429 is a deficient number, since it is larger than the sum of its proper divisors (29601537).

66603429 is a wasteful number, since it uses less digits than its factorization.

66603429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400387 (or 7400384 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 66603429 is about 8161.0923901154. The cubic root of 66603429 is about 405.3518843915.

The spelling of 66603429 in words is "sixty-six million, six hundred three thousand, four hundred twenty-nine".