66253126 has 4 divisors (see below), whose sum is σ = 99379692. Its totient is φ = 33126562.

The previous prime is 66253123. The next prime is 66253141. The reversal of 66253126 is 62135266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62135266 = 2 ⋅31067633.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66253123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16563280 + ... + 16563283.

It is an arithmetic number, because the mean of its divisors is an integer number (24844923).

Almost surely, 2^66253126 is an apocalyptic number.

66253126 is a deficient number, since it is larger than the sum of its proper divisors (33126566).

66253126 is a wasteful number, since it uses less digits than its factorization.

66253126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33126565.

The product of its digits is 12960, while the sum is 31.

The square root of 66253126 is about 8139.6023244382. The cubic root of 66253126 is about 404.6399808279.

The spelling of 66253126 in words is "sixty-six million, two hundred fifty-three thousand, one hundred twenty-six".