260664653 has 8 divisors (see below), whose sum is σ = 265903128. Its totient is φ = 255438144.

The previous prime is 260664641. The next prime is 260664659. The reversal of 260664653 is 356466062.

It can be written as a sum of positive squares in 4 ways, for example, as 86081284 + 174583369 = 9278^2 + 13213^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 260664653 - 2¹⁸ = 260402509 is a prime.

It is a super-2 number, since 2×260664653² = 135892122647220818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260664659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50375 + ... + 55307.

It is an arithmetic number, because the mean of its divisors is an integer number (33237891).

Almost surely, 2^260664653 is an apocalyptic number.

It is an amenable number.

260664653 is a deficient number, since it is larger than the sum of its proper divisors (5238475).

260664653 is an equidigital number, since it uses as much as digits as its factorization.

260664653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 260664653 is about 16145.1123563758. The cubic root of 260664653 is about 638.7938325702.

The spelling of 260664653 in words is "two hundred sixty million, six hundred sixty-four thousand, six hundred fifty-three".