261669803 has 8 divisors (see below), whose sum is σ = 263151168. Its totient is φ = 260193024.

The previous prime is 261669799. The next prime is 261669817. The reversal of 261669803 is 308966162.

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 261669803 - 2² = 261669799 is a prime.

It is a super-3 number, since 3×261669803³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261669823) 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, 196526 + ... + 197852.

It is an arithmetic number, because the mean of its divisors is an integer number (32893896).

Almost surely, 2^261669803 is an apocalyptic number.

261669803 is a deficient number, since it is larger than the sum of its proper divisors (1481365).

261669803 is a wasteful number, since it uses less digits than its factorization.

261669803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 261669803 is about 16176.2110211261. The cubic root of 261669803 is about 639.6138645707.

The spelling of 261669803 in words is "two hundred sixty-one million, six hundred sixty-nine thousand, eight hundred three".