66069575 has 24 divisors (see below), whose sum is σ = 96254256. Its totient is φ = 44352000.

The previous prime is 66069541. The next prime is 66069581. The reversal of 66069575 is 57596066.

It is not a de Polignac number, because 66069575 - 2¹⁴ = 66053191 is a prime.

It is a Duffinian number.

It is a congruent 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, 5666 + ... + 12815.

It is an arithmetic number, because the mean of its divisors is an integer number (4010594).

Almost surely, 2^66069575 is an apocalyptic number.

66069575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66069575 is a deficient number, since it is larger than the sum of its proper divisors (30184681).

66069575 is a wasteful number, since it uses less digits than its factorization.

66069575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18515 (or 18510 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 66069575 is about 8128.3193219755. The cubic root of 66069575 is about 404.2659568766.

The spelling of 66069575 in words is "sixty-six million, sixty-nine thousand, five hundred seventy-five".