65225778 has 16 divisors (see below), whose sum is σ = 130605696. Its totient is φ = 21716240.

The previous prime is 65225777. The next prime is 65225789. The reversal of 65225778 is 87752256.

It is not an unprimeable number, because it can be changed into a prime (65225777) 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, 501 + ... + 11432.

It is an arithmetic number, because the mean of its divisors is an integer number (8162856).

Almost surely, 2^65225778 is an apocalyptic number.

65225778 is an abundant number, since it is smaller than the sum of its proper divisors (65379918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65225778 is a wasteful number, since it uses less digits than its factorization.

65225778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12849.

The product of its digits is 235200, while the sum is 42.

The square root of 65225778 is about 8076.2477673732. The cubic root of 65225778 is about 402.5375719463.

The spelling of 65225778 in words is "sixty-five million, two hundred twenty-five thousand, seven hundred seventy-eight".