65978475 has 12 divisors (see below), whose sum is σ = 109084536. Its totient is φ = 35188480.

The previous prime is 65978441. The next prime is 65978477. The reversal of 65978475 is 57487956.

It is not a de Polignac number, because 65978475 - 2⁷ = 65978347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65978477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439782 + ... + 439931.

It is an arithmetic number, because the mean of its divisors is an integer number (9090378).

Almost surely, 2^65978475 is an apocalyptic number.

65978475 is a deficient number, since it is larger than the sum of its proper divisors (43106061).

65978475 is a wasteful number, since it uses less digits than its factorization.

65978475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879726 (or 879721 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 51.

The square root of 65978475 is about 8122.7135244326. The cubic root of 65978475 is about 404.0800641078.

The spelling of 65978475 in words is "sixty-five million, nine hundred seventy-eight thousand, four hundred seventy-five".