66495275 has 24 divisors (see below), whose sum is σ = 102802944. Its totient is φ = 41450400.

The previous prime is 66495239. The next prime is 66495293. The reversal of 66495275 is 57259466.

It is not a de Polignac number, because 66495275 - 2¹⁶ = 66429739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15347 + ... + 19196.

It is an arithmetic number, because the mean of its divisors is an integer number (4283456).

Almost surely, 2^66495275 is an apocalyptic number.

66495275 is a deficient number, since it is larger than the sum of its proper divisors (36307669).

66495275 is a wasteful number, since it uses less digits than its factorization.

66495275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34571 (or 34566 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 66495275 is about 8154.4635016658. The cubic root of 66495275 is about 405.1323552577.

The spelling of 66495275 in words is "sixty-six million, four hundred ninety-five thousand, two hundred seventy-five".