65693978 has 8 divisors (see below), whose sum is σ = 112618272. Its totient is φ = 28154556.

The previous prime is 65693939. The next prime is 65693983. The reversal of 65693978 is 87939656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346200 + ... + 2346227.

It is an arithmetic number, because the mean of its divisors is an integer number (14077284).

Almost surely, 2^65693978 is an apocalyptic number.

65693978 is a deficient number, since it is larger than the sum of its proper divisors (46924294).

65693978 is a wasteful number, since it uses less digits than its factorization.

65693978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692436.

The product of its digits is 2449440, while the sum is 53.

The square root of 65693978 is about 8105.1821694518. The cubic root of 65693978 is about 403.4984340286.

The spelling of 65693978 in words is "sixty-five million, six hundred ninety-three thousand, nine hundred seventy-eight".