66253271 has 16 divisors (see below), whose sum is σ = 80025600. Its totient is φ = 53621568.

The previous prime is 66253249. The next prime is 66253279. The reversal of 66253271 is 17235266.

It is not a de Polignac number, because 66253271 - 2²² = 62058967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66253279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10115 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (5001600).

Almost surely, 2^66253271 is an apocalyptic number.

66253271 is a deficient number, since it is larger than the sum of its proper divisors (13772329).

66253271 is a wasteful number, since it uses less digits than its factorization.

66253271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318.

The product of its digits is 15120, while the sum is 32.

The square root of 66253271 is about 8139.6112315024. The cubic root of 66253271 is about 404.6402760228.

The spelling of 66253271 in words is "sixty-six million, two hundred fifty-three thousand, two hundred seventy-one".