655247775 has 192 divisors, whose sum is σ = 1457684480. Its totient is φ = 251942400.

The previous prime is 655247767. The next prime is 655247783. The reversal of 655247775 is 577742556.

It is an interprime number because it is at equal distance from previous prime (655247767) and next prime (655247783).

It is not a de Polignac number, because 655247775 - 2³ = 655247767 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 4019844 + ... + 4020006.

Almost surely, 2^655247775 is an apocalyptic number.

655247775 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

655247775 is an abundant number, since it is smaller than the sum of its proper divisors (802436705).

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

655247775 is a wasteful number, since it uses less digits than its factorization.

655247775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 241 counting only the distinct ones).

The product of its digits is 2058000, while the sum is 48.

The square root of 655247775 is about 25597.8080116247. The cubic root of 655247775 is about 868.5640535039.

The spelling of 655247775 in words is "six hundred fifty-five million, two hundred forty-seven thousand, seven hundred seventy-five".