69660561 has 4 divisors (see below), whose sum is σ = 92880752. Its totient is φ = 46440372.

The previous prime is 69660467. The next prime is 69660571. The reversal of 69660561 is 16506696.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 69660561 - 2¹³ = 69652369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (69660571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11610091 + ... + 11610096.

It is an arithmetic number, because the mean of its divisors is an integer number (23220188).

Almost surely, 2^69660561 is an apocalyptic number.

It is an amenable number.

69660561 is a deficient number, since it is larger than the sum of its proper divisors (23220191).

69660561 is a wasteful number, since it uses less digits than its factorization.

69660561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23220190.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 69660561 is about 8346.2902537595. The cubic root of 69660561 is about 411.4612955708.

The spelling of 69660561 in words is "sixty-nine million, six hundred sixty thousand, five hundred sixty-one".