65940811 has 8 divisors (see below), whose sum is σ = 70027920. Its totient is φ = 61915392.

The previous prime is 65940769. The next prime is 65940829. The reversal of 65940811 is 11804956.

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 65940811 - 2¹⁵ = 65908043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65940871) 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, 13210 + ... + 17503.

It is an arithmetic number, because the mean of its divisors is an integer number (8753490).

Almost surely, 2^65940811 is an apocalyptic number.

65940811 is a deficient number, since it is larger than the sum of its proper divisors (4087109).

65940811 is a wasteful number, since it uses less digits than its factorization.

65940811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30845.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 65940811 is about 8120.3947564142. The cubic root of 65940811 is about 404.0031593878.

The spelling of 65940811 in words is "sixty-five million, nine hundred forty thousand, eight hundred eleven".