65819801 has 8 divisors (see below), whose sum is σ = 71392104. Its totient is φ = 60436480.

The previous prime is 65819797. The next prime is 65819827. The reversal of 65819801 is 10891856.

It can be written as a sum of positive squares in 4 ways, for example, as 1819801 + 64000000 = 1349^2 + 8000^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 65819801 - 2² = 65819797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65819101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46520 + ... + 47913.

It is an arithmetic number, because the mean of its divisors is an integer number (8924013).

Almost surely, 2^65819801 is an apocalyptic number.

It is an amenable number.

65819801 is a deficient number, since it is larger than the sum of its proper divisors (5572303).

65819801 is a wasteful number, since it uses less digits than its factorization.

65819801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94491.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 65819801 is about 8112.9403424406. The cubic root of 65819801 is about 403.7558752065.

The spelling of 65819801 in words is "sixty-five million, eight hundred nineteen thousand, eight hundred one".