65257020 has 72 divisors (see below), whose sum is σ = 208375440. Its totient is φ = 16485120.

The previous prime is 65257019. The next prime is 65257021. The reversal of 65257020 is 2075256.

65257020 is a `hidden beast` number, since 652 + 5 + 7 + 0 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (65257019) and next prime (65257021).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65257021) 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 23 ways as a sum of consecutive naturals, for example, 6121 + ... + 12960.

Almost surely, 2^65257020 is an apocalyptic number.

65257020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65257020 is an abundant number, since it is smaller than the sum of its proper divisors (143118420).

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

65257020 is a wasteful number, since it uses less digits than its factorization.

65257020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19115 (or 19110 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 65257020 is about 8078.1817261064. The cubic root of 65257020 is about 402.6018311591.

The spelling of 65257020 in words is "sixty-five million, two hundred fifty-seven thousand, twenty".