64916887 has 4 divisors (see below), whose sum is σ = 74190736. Its totient is φ = 55643040.

The previous prime is 64916881. The next prime is 64916911. The reversal of 64916887 is 78861946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64916887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64916887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64916881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4636914 + ... + 4636927.

It is an arithmetic number, because the mean of its divisors is an integer number (18547684).

Almost surely, 2^64916887 is an apocalyptic number.

64916887 is a deficient number, since it is larger than the sum of its proper divisors (9273849).

64916887 is an equidigital number, since it uses as much as digits as its factorization.

64916887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9273848.

The product of its digits is 580608, while the sum is 49.

The square root of 64916887 is about 8057.1016500973. The cubic root of 64916887 is about 401.9011311854.

The spelling of 64916887 in words is "sixty-four million, nine hundred sixteen thousand, eight hundred eighty-seven".