65773920 has 48 divisors (see below), whose sum is σ = 207189360. Its totient is φ = 17539584.

The previous prime is 65773907. The next prime is 65773957. The reversal of 65773920 is 2937756.

65773920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 68035 + ... + 68994.

It is an arithmetic number, because the mean of its divisors is an integer number (4316445).

Almost surely, 2^65773920 is an apocalyptic number.

65773920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65773920 is an abundant number, since it is smaller than the sum of its proper divisors (141415440).

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

65773920 is a wasteful number, since it uses less digits than its factorization.

65773920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137047 (or 137039 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 65773920 is about 8110.1122063754. The cubic root of 65773920 is about 403.6620380478.

It can be divided in two parts, 657 and 73920, that multiplied together give a triangular number (48565440 = T₉₈₅₅).

The spelling of 65773920 in words is "sixty-five million, seven hundred seventy-three thousand, nine hundred twenty".