655416977 has 4 divisors (see below), whose sum is σ = 661906356. Its totient is φ = 648927600.

The previous prime is 655416967. The next prime is 655416991. The reversal of 655416977 is 779614556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 628956241 + 26460736 = 25079^2 + 5144^2 .

It is a cyclic number.

It is not a de Polignac number, because 655416977 - 2¹⁴ = 655400593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655416967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3244538 + ... + 3244739.

It is an arithmetic number, because the mean of its divisors is an integer number (165476589).

Almost surely, 2^655416977 is an apocalyptic number.

It is an amenable number.

655416977 is a deficient number, since it is larger than the sum of its proper divisors (6489379).

655416977 is a wasteful number, since it uses less digits than its factorization.

655416977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489378.

The product of its digits is 1587600, while the sum is 50.

The square root of 655416977 is about 25601.1128078449. The cubic root of 655416977 is about 868.6388090048.

The spelling of 655416977 in words is "six hundred fifty-five million, four hundred sixteen thousand, nine hundred seventy-seven".