65801998 has 8 divisors (see below), whose sum is σ = 98782992. Its totient is φ = 32874336.

The previous prime is 65801969. The next prime is 65802001. The reversal of 65801998 is 89910856.

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

It is a congruent number.

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, 10090 + ... + 15277.

It is an arithmetic number, because the mean of its divisors is an integer number (12347874).

Almost surely, 2^65801998 is an apocalyptic number.

65801998 is a deficient number, since it is larger than the sum of its proper divisors (32980994).

65801998 is a wasteful number, since it uses less digits than its factorization.

65801998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26666.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 65801998 is about 8111.8430704742. The cubic root of 65801998 is about 403.7194691710.

The spelling of 65801998 in words is "sixty-five million, eight hundred one thousand, nine hundred ninety-eight".