65425821 has 8 divisors (see below), whose sum is σ = 88134144. Its totient is φ = 43167360.

The previous prime is 65425817. The next prime is 65425831. The reversal of 65425821 is 12852456.

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

It is not a de Polignac number, because 65425821 - 2² = 65425817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65425831) 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, 112125 + ... + 112706.

It is an arithmetic number, because the mean of its divisors is an integer number (11016768).

Almost surely, 2^65425821 is an apocalyptic number.

It is an amenable number.

65425821 is a deficient number, since it is larger than the sum of its proper divisors (22708323).

65425821 is a wasteful number, since it uses less digits than its factorization.

65425821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224931.

The product of its digits is 19200, while the sum is 33.

The square root of 65425821 is about 8088.6229359515. The cubic root of 65425821 is about 402.9486703626.

The spelling of 65425821 in words is "sixty-five million, four hundred twenty-five thousand, eight hundred twenty-one".