66020297 has 20 divisors (see below), whose sum is σ = 79593216. Its totient is φ = 54701640.

The previous prime is 66020287. The next prime is 66020303. The reversal of 66020297 is 79202066.

It is not a de Polignac number, because 66020297 - 2¹⁶ = 65954761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66020287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 73988 + ... + 74874.

Almost surely, 2^66020297 is an apocalyptic number.

It is an amenable number.

66020297 is a deficient number, since it is larger than the sum of its proper divisors (13572919).

66020297 is an frugal number, since it uses more digits than its factorization.

66020297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 66020297 is about 8125.2875026057. The cubic root of 66020297 is about 404.1654246086.

The spelling of 66020297 in words is "sixty-six million, twenty thousand, two hundred ninety-seven".