69676561 has 8 divisors (see below), whose sum is σ = 72021248. Its totient is φ = 67338000.

The previous prime is 69676549. The next prime is 69676571. The reversal of 69676561 is 16567696.

69676561 = T₆₈₁₄ + T₆₈₁₅ + T₆₈₁₆.

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 69676561 - 2⁹ = 69676049 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69676571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39151 + ... + 40891.

It is an arithmetic number, because the mean of its divisors is an integer number (9002656).

Almost surely, 2^69676561 is an apocalyptic number.

69676561 is the 6816-th centered triangular number.

It is an amenable number.

69676561 is a deficient number, since it is larger than the sum of its proper divisors (2344687).

69676561 is a wasteful number, since it uses less digits than its factorization.

69676561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063.

The product of its digits is 408240, while the sum is 46.

The square root of 69676561 is about 8347.2487084069. The cubic root of 69676561 is about 411.4927953494.

The spelling of 69676561 in words is "sixty-nine million, six hundred seventy-six thousand, five hundred sixty-one".