66020229 has 12 divisors (see below), whose sum is σ = 104032032. Its totient is φ = 40012200.

The previous prime is 66020203. The next prime is 66020243. The reversal of 66020229 is 92202066.

It is not a de Polignac number, because 66020229 - 2⁸ = 66019973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66020029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333337 + ... + 333534.

It is an arithmetic number, because the mean of its divisors is an integer number (8669336).

Almost surely, 2^66020229 is an apocalyptic number.

It is an amenable number.

66020229 is a deficient number, since it is larger than the sum of its proper divisors (38011803).

66020229 is a wasteful number, since it uses less digits than its factorization.

66020229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666888 (or 666885 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66020229 is about 8125.2833181373. The cubic root of 66020229 is about 404.1652858469.

The spelling of 66020229 in words is "sixty-six million, twenty thousand, two hundred twenty-nine".