65947885 has 16 divisors (see below), whose sum is σ = 83870640. Its totient is φ = 49692160.

The previous prime is 65947873. The next prime is 65947927. The reversal of 65947885 is 58874956.

It can be written as a sum of positive squares in 8 ways, for example, as 1643524 + 64304361 = 1282^2 + 8019^2 .

It is not a de Polignac number, because 65947885 - 2⁹ = 65947373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399 + ... + 11491.

It is an arithmetic number, because the mean of its divisors is an integer number (5241915).

Almost surely, 2^65947885 is an apocalyptic number.

It is an amenable number.

65947885 is a deficient number, since it is larger than the sum of its proper divisors (17922755).

65947885 is a wasteful number, since it uses less digits than its factorization.

65947885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11168.

The product of its digits is 2419200, while the sum is 52.

The square root of 65947885 is about 8120.8303146907. The cubic root of 65947885 is about 404.0176057583.

The spelling of 65947885 in words is "sixty-five million, nine hundred forty-seven thousand, eight hundred eighty-five".