655620732777 has 8 divisors (see below), whose sum is σ = 876953824864. Its totient is φ = 435684064608.

The previous prime is 655620732709. The next prime is 655620732791. The reversal of 655620732777 is 777237026556.

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

It is not a de Polignac number, because 655620732777 - 2¹⁴ = 655620716393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655620732797) by changing a digit.

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, 349104883 + ... + 349106760.

It is an arithmetic number, because the mean of its divisors is an integer number (109619228108).

Almost surely, 2^655620732777 is an apocalyptic number.

It is an amenable number.

655620732777 is a deficient number, since it is larger than the sum of its proper divisors (221333092087).

655620732777 is a wasteful number, since it uses less digits than its factorization.

655620732777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698211959.

The product of its (nonzero) digits is 25930800, while the sum is 57.

The spelling of 655620732777 in words is "six hundred fifty-five billion, six hundred twenty million, seven hundred thirty-two thousand, seven hundred seventy-seven".