65570018 has 4 divisors (see below), whose sum is σ = 98355030. Its totient is φ = 32785008.

The previous prime is 65570017. The next prime is 65570023. The reversal of 65570018 is 81007556.

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., 57350329 + 8219689 = 7573^2 + 2867^2 .

It is not an unprimeable number, because it can be changed into a prime (65570017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16392503 + ... + 16392506.

Almost surely, 2^65570018 is an apocalyptic number.

65570018 is a deficient number, since it is larger than the sum of its proper divisors (32785012).

65570018 is a wasteful number, since it uses less digits than its factorization.

65570018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32785011.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 65570018 is about 8097.5315991974. The cubic root of 65570018 is about 403.2444830051.

The spelling of 65570018 in words is "sixty-five million, five hundred seventy thousand, eighteen".