65581370785 has 8 divisors (see below), whose sum is σ = 89940165696. Its totient is φ = 44970082800.

The previous prime is 65581370731. The next prime is 65581370831. The reversal of 65581370785 is 58707318556.

65581370785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65581370785 - 2²⁵ = 65547816353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936876691 + ... + 936876760.

It is an arithmetic number, because the mean of its divisors is an integer number (11242520712).

Almost surely, 2^65581370785 is an apocalyptic number.

It is an amenable number.

65581370785 is a deficient number, since it is larger than the sum of its proper divisors (24358794911).

65581370785 is a wasteful number, since it uses less digits than its factorization.

65581370785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873753463.

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 65581370785 in words is "sixty-five billion, five hundred eighty-one million, three hundred seventy thousand, seven hundred eighty-five".