65701980 has 144 divisors (see below), whose sum is σ = 208039104. Its totient is φ = 16773120.

The previous prime is 65701969. The next prime is 65702003. The reversal of 65701980 is 8910756.

65701980 is a `hidden beast` number, since 6 + 570 + 1 + 9 + 80 = 666.

65701980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 677292 + ... + 677388.

It is an arithmetic number, because the mean of its divisors is an integer number (1444716).

Almost surely, 2^65701980 is an apocalyptic number.

65701980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65701980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104019552).

65701980 is an abundant number, since it is smaller than the sum of its proper divisors (142337124).

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

65701980 is a wasteful number, since it uses less digits than its factorization.

65701980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 65701980 is about 8105.6757892233. The cubic root of 65701980 is about 403.5148163693.

The spelling of 65701980 in words is "sixty-five million, seven hundred one thousand, nine hundred eighty".