261370669 has 8 divisors (see below), whose sum is σ = 314431040. Its totient is φ = 212240736.

The previous prime is 261370657. The next prime is 261370673. The reversal of 261370669 is 966073162.

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 261370669 - 2⁷ = 261370541 is a prime.

It is a super-2 number, since 2×261370669² = 136629253227015122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261370679) 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, 982464 + ... + 982729.

It is an arithmetic number, because the mean of its divisors is an integer number (39303880).

Almost surely, 2^261370669 is an apocalyptic number.

It is an amenable number.

261370669 is a deficient number, since it is larger than the sum of its proper divisors (53060371).

261370669 is a wasteful number, since it uses less digits than its factorization.

261370669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965219.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 261370669 is about 16166.9622687752. The cubic root of 261370669 is about 639.3700417505.

The spelling of 261370669 in words is "two hundred sixty-one million, three hundred seventy thousand, six hundred sixty-nine".