66070223 has 4 divisors (see below), whose sum is σ = 66103800. Its totient is φ = 66036648.

The previous prime is 66070187. The next prime is 66070247. The reversal of 66070223 is 32207066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32207066 = 2 ⋅16103533.

It is a cyclic number.

It is not a de Polignac number, because 66070223 - 2⁸ = 66069967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66070192 and 66070201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66070423) 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, 13640 + ... + 17837.

It is an arithmetic number, because the mean of its divisors is an integer number (16525950).

Almost surely, 2^66070223 is an apocalyptic number.

66070223 is a deficient number, since it is larger than the sum of its proper divisors (33577).

66070223 is a wasteful number, since it uses less digits than its factorization.

66070223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33576.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 66070223 is about 8128.3591825165. The cubic root of 66070223 is about 404.2672785313.

Adding to 66070223 its reverse (32207066), we get a palindrome (98277289).

The spelling of 66070223 in words is "sixty-six million, seventy thousand, two hundred twenty-three".