66319253 has 48 divisors (see below), whose sum is σ = 94738560. Its totient is φ = 45048960.

The previous prime is 66319249. The next prime is 66319289. The reversal of 66319253 is 35291366.

It is not a de Polignac number, because 66319253 - 2² = 66319249 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66319223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209051 + ... + 209367.

It is an arithmetic number, because the mean of its divisors is an integer number (1973720).

Almost surely, 2^66319253 is an apocalyptic number.

It is an amenable number.

66319253 is a deficient number, since it is larger than the sum of its proper divisors (28419307).

66319253 is a wasteful number, since it uses less digits than its factorization.

66319253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 367 counting only the distinct ones).

The product of its digits is 29160, while the sum is 35.

The square root of 66319253 is about 8143.6633648500. The cubic root of 66319253 is about 404.7745592865.

The spelling of 66319253 in words is "sixty-six million, three hundred nineteen thousand, two hundred fifty-three".