65660998 has 32 divisors (see below), whose sum is σ = 116524800. Its totient is φ = 27457056.

The previous prime is 65660981. The next prime is 65661047. The reversal of 65660998 is 89906656.

It is a super-2 number, since 2×65660998² = 8622733316712008, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8473 + ... + 14251.

It is an arithmetic number, because the mean of its divisors is an integer number (3641400).

Almost surely, 2^65660998 is an apocalyptic number.

65660998 is a deficient number, since it is larger than the sum of its proper divisors (50863802).

65660998 is a wasteful number, since it uses less digits than its factorization.

65660998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 65660998 is about 8103.1474131969. The cubic root of 65660998 is about 403.4309006653.

The spelling of 65660998 in words is "sixty-five million, six hundred sixty thousand, nine hundred ninety-eight".