260664634 has 8 divisors (see below), whose sum is σ = 400533588. Its totient is φ = 127153440.

The previous prime is 260664601. The next prime is 260664641. The reversal of 260664634 is 436466062.

It can be written as a sum of positive squares in 2 ways, for example, as 258405625 + 2259009 = 16075^2 + 1503^2 .

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

It is a super-3 number, since 3×260664634³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 260664593 and 260664602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589337 + ... + 1589500.

Almost surely, 2^260664634 is an apocalyptic number.

260664634 is a deficient number, since it is larger than the sum of its proper divisors (139868954).

260664634 is a wasteful number, since it uses less digits than its factorization.

260664634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178880.

The product of its (nonzero) digits is 124416, while the sum is 37.

The square root of 260664634 is about 16145.1117679625. Note that the first 3 decimals coincide. The cubic root of 260664634 is about 638.7938170495.

The spelling of 260664634 in words is "two hundred sixty million, six hundred sixty-four thousand, six hundred thirty-four".