65820887 has 8 divisors (see below), whose sum is σ = 71864832. Its totient is φ = 59787000.

The previous prime is 65820877. The next prime is 65820907. The reversal of 65820887 is 78802856.

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 65820887 - 2⁶ = 65820823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65820847) 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, 19928 + ... + 22994.

It is an arithmetic number, because the mean of its divisors is an integer number (8983104).

Almost surely, 2^65820887 is an apocalyptic number.

65820887 is a deficient number, since it is larger than the sum of its proper divisors (6043945).

65820887 is a wasteful number, since it uses less digits than its factorization.

65820887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 65820887 is about 8113.0072722758. The cubic root of 65820887 is about 403.7580957969.

The spelling of 65820887 in words is "sixty-five million, eight hundred twenty thousand, eight hundred eighty-seven".