65641955 has 8 divisors (see below), whose sum is σ = 78838704. Its totient is φ = 52468000.

The previous prime is 65641897. The next prime is 65641957. The reversal of 65641955 is 55914656.

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

It is a de Polignac number, because none of the positive numbers 2^k-65641955 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65641957) 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 7 ways as a sum of consecutive naturals, for example, 1460 + ... + 11550.

It is an arithmetic number, because the mean of its divisors is an integer number (9854838).

Almost surely, 2^65641955 is an apocalyptic number.

65641955 is a deficient number, since it is larger than the sum of its proper divisors (13196749).

65641955 is a wasteful number, since it uses less digits than its factorization.

65641955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11397.

The product of its digits is 162000, while the sum is 41.

The square root of 65641955 is about 8101.9722907450. The cubic root of 65641955 is about 403.3918958898.

The spelling of 65641955 in words is "sixty-five million, six hundred forty-one thousand, nine hundred fifty-five".