65764560 has 40 divisors (see below), whose sum is σ = 203870880. Its totient is φ = 17537152.

The previous prime is 65764553. The next prime is 65764561. The reversal of 65764560 is 6546756.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65764561) 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, 136770 + ... + 137249.

It is an arithmetic number, because the mean of its divisors is an integer number (5096772).

Almost surely, 2^65764560 is an apocalyptic number.

65764560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65764560 is an abundant number, since it is smaller than the sum of its proper divisors (138106320).

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

65764560 is a wasteful number, since it uses less digits than its factorization.

65764560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274035 (or 274029 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 65764560 is about 8109.5351284768. The cubic root of 65764560 is about 403.6428893441.

The spelling of 65764560 in words is "sixty-five million, seven hundred sixty-four thousand, five hundred sixty".