66352375 has 16 divisors (see below), whose sum is σ = 83191680. Its totient is φ = 52836000.

The previous prime is 66352339. The next prime is 66352409. The reversal of 66352375 is 57325366.

It is a happy number.

It is not a de Polignac number, because 66352375 - 2²⁵ = 32797943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28765 + ... + 30985.

It is an arithmetic number, because the mean of its divisors is an integer number (5199480).

Almost surely, 2^66352375 is an apocalyptic number.

66352375 is a deficient number, since it is larger than the sum of its proper divisors (16839305).

66352375 is a wasteful number, since it uses less digits than its factorization.

66352375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2465 counting only the distinct ones).

The product of its digits is 113400, while the sum is 37.

The square root of 66352375 is about 8145.6967166719. The cubic root of 66352375 is about 404.8419339477.

The spelling of 66352375 in words is "sixty-six million, three hundred fifty-two thousand, three hundred seventy-five".