656605253 has 2 divisors, whose sum is σ = 656605254. Its totient is φ = 656605252.

The previous prime is 656605247. The next prime is 656605273. The reversal of 656605253 is 352506656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628906084 + 27699169 = 25078^2 + 5263^2 .

It is a cyclic number.

It is not a de Polignac number, because 656605253 - 2¹⁰ = 656604229 is a prime.

It is a super-2 number, since 2×656605253² = 862260916534388018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656605273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328302626 + 328302627.

It is an arithmetic number, because the mean of its divisors is an integer number (328302627).

Almost surely, 2^656605253 is an apocalyptic number.

It is an amenable number.

656605253 is a deficient number, since it is larger than the sum of its proper divisors (1).

656605253 is an equidigital number, since it uses as much as digits as its factorization.

656605253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 38.

The square root of 656605253 is about 25624.3098053391. The cubic root of 656605253 is about 869.1634416830.

It can be divided in two parts, 65660 and 5253, that multiplied together give a triangular number (344911980 = T₂₆₂₆₄).

The spelling of 656605253 in words is "six hundred fifty-six million, six hundred five thousand, two hundred fifty-three".