65770705880 has 32 divisors (see below), whose sum is σ = 161437188240. Its totient is φ = 23916620160.

The previous prime is 65770705879. The next prime is 65770705951. The reversal of 65770705880 is 8850707756.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74738999 + ... + 74739878.

Almost surely, 2^65770705880 is an apocalyptic number.

It is an amenable number.

65770705880 is an abundant number, since it is smaller than the sum of its proper divisors (95666482360).

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

65770705880 is a wasteful number, since it uses less digits than its factorization.

65770705880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149478899 (or 149478895 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 53.

The spelling of 65770705880 in words is "sixty-five billion, seven hundred seventy million, seven hundred five thousand, eight hundred eighty".