65899378 has 8 divisors (see below), whose sum is σ = 104663772. Its totient is φ = 31011456.

The previous prime is 65899373. The next prime is 65899381. The reversal of 65899378 is 87399856.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65885689 + 13689 = 8117^2 + 117^2 .

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

It is not an unprimeable number, because it can be changed into a prime (65899373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969075 + ... + 969142.

Almost surely, 2^65899378 is an apocalyptic number.

65899378 is a deficient number, since it is larger than the sum of its proper divisors (38764394).

65899378 is a wasteful number, since it uses less digits than its factorization.

65899378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938236.

The product of its digits is 3265920, while the sum is 55.

The square root of 65899378 is about 8117.8431864628. The cubic root of 65899378 is about 403.9185250529.

The spelling of 65899378 in words is "sixty-five million, eight hundred ninety-nine thousand, three hundred seventy-eight".