260667621 has 24 divisors (see below), whose sum is σ = 385178976. Its totient is φ = 169809120.

The previous prime is 260667619. The next prime is 260667629. The reversal of 260667621 is 126766062.

260667621 is a `hidden beast` number, since 26 + 0 + 6 + 6 + 7 + 621 = 666.

It is not a de Polignac number, because 260667621 - 2¹ = 260667619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260667629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134026 + ... + 135956.

It is an arithmetic number, because the mean of its divisors is an integer number (16049124).

Almost surely, 2^260667621 is an apocalyptic number.

It is an amenable number.

260667621 is a deficient number, since it is larger than the sum of its proper divisors (124511355).

260667621 is a wasteful number, since it uses less digits than its factorization.

260667621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273 (or 2270 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 260667621 is about 16145.2042724767. The cubic root of 260667621 is about 638.7962570555.

The spelling of 260667621 in words is "two hundred sixty million, six hundred sixty-seven thousand, six hundred twenty-one".