65981698 has 8 divisors (see below), whose sum is σ = 99033408. Its totient is φ = 32970564.

The previous prime is 65981689. The next prime is 65981723. The reversal of 65981698 is 89618956.

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, 5686 + ... + 12817.

It is an arithmetic number, because the mean of its divisors is an integer number (12379176).

Almost surely, 2^65981698 is an apocalyptic number.

65981698 is a deficient number, since it is larger than the sum of its proper divisors (33051710).

65981698 is a wasteful number, since it uses less digits than its factorization.

65981698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20288.

The product of its digits is 933120, while the sum is 52.

The square root of 65981698 is about 8122.9119163019. The cubic root of 65981698 is about 404.0866436720.

The spelling of 65981698 in words is "sixty-five million, nine hundred eighty-one thousand, six hundred ninety-eight".