65220405 has 8 divisors (see below), whose sum is σ = 104352672. Its totient is φ = 34784208.

The previous prime is 65220401. The next prime is 65220437. The reversal of 65220405 is 50402256.

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

It is not a de Polignac number, because 65220405 - 2² = 65220401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65220401) 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, 2173999 + ... + 2174028.

It is an arithmetic number, because the mean of its divisors is an integer number (13044084).

Almost surely, 2^65220405 is an apocalyptic number.

It is an amenable number.

65220405 is a deficient number, since it is larger than the sum of its proper divisors (39132267).

65220405 is a wasteful number, since it uses less digits than its factorization.

65220405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348035.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 65220405 is about 8075.9151184247. The cubic root of 65220405 is about 402.5265185774.

The spelling of 65220405 in words is "sixty-five million, two hundred twenty thousand, four hundred five".