65898720 has 72 divisors (see below), whose sum is σ = 224884296. Its totient is φ = 17572608.

The previous prime is 65898697. The next prime is 65898743. The reversal of 65898720 is 2789856.

65898720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65898697) and next prime (65898743).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21442 + ... + 24321.

It is an arithmetic number, because the mean of its divisors is an integer number (3123393).

Almost surely, 2^65898720 is an apocalyptic number.

65898720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65898720 is an abundant number, since it is smaller than the sum of its proper divisors (158985576).

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

65898720 is a wasteful number, since it uses less digits than its factorization.

65898720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45784 (or 45773 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 65898720 is about 8117.8026583553. The cubic root of 65898720 is about 403.9171806837.

The spelling of 65898720 in words is "sixty-five million, eight hundred ninety-eight thousand, seven hundred twenty".