66020299 has 4 divisors (see below), whose sum is σ = 69903864. Its totient is φ = 62136736.

The previous prime is 66020287. The next prime is 66020303. The reversal of 66020299 is 99202066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99202066 = 2 ⋅49601033.

It is a cyclic number.

It is not a de Polignac number, because 66020299 - 2¹⁵ = 65987531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66020399) 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, 1941757 + ... + 1941790.

It is an arithmetic number, because the mean of its divisors is an integer number (17475966).

Almost surely, 2^66020299 is an apocalyptic number.

66020299 is a deficient number, since it is larger than the sum of its proper divisors (3883565).

66020299 is a wasteful number, since it uses less digits than its factorization.

66020299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883564.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 66020299 is about 8125.2876256782. The cubic root of 66020299 is about 404.1654286898.

The spelling of 66020299 in words is "sixty-six million, twenty thousand, two hundred ninety-nine".