65782018 has 4 divisors (see below), whose sum is σ = 98673030. Its totient is φ = 32891008.

The previous prime is 65781953. The next prime is 65782019. The reversal of 65782018 is 81028756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33212169 + 32569849 = 5763^2 + 5707^2 .

It is not an unprimeable number, because it can be changed into a prime (65782019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16445503 + ... + 16445506.

Almost surely, 2^65782018 is an apocalyptic number.

65782018 is a deficient number, since it is larger than the sum of its proper divisors (32891012).

65782018 is a wasteful number, since it uses less digits than its factorization.

65782018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32891011.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 65782018 is about 8110.6114442747. The cubic root of 65782018 is about 403.6786034841.

The spelling of 65782018 in words is "sixty-five million, seven hundred eighty-two thousand, eighteen".