65604769776 has 960 divisors, whose sum is σ = 248864071680. Its totient is φ = 16174080000.

The previous prime is 65604769759. The next prime is 65604769787. The reversal of 65604769776 is 67796740656.

65604769776 is a `hidden beast` number, since 6 + 5 + 6 + 0 + 476 + 97 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 649552126 + ... + 649552226.

It is an arithmetic number, because the mean of its divisors is an integer number (259233408).

Almost surely, 2^65604769776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65604769776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124432035840).

65604769776 is an abundant number, since it is smaller than the sum of its proper divisors (183259301904).

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

65604769776 is a wasteful number, since it uses less digits than its factorization.

65604769776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 63.

The spelling of 65604769776 in words is "sixty-five billion, six hundred four million, seven hundred sixty-nine thousand, seven hundred seventy-six".