57664665521 has 8 divisors (see below), whose sum is σ = 58930196544. Its totient is φ = 56405709360.

The previous prime is 57664665497. The next prime is 57664665563. The reversal of 57664665521 is 12556646675.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57664665521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57664662521) 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, 1625981 + ... + 1661066.

It is an arithmetic number, because the mean of its divisors is an integer number (7366274568).

Almost surely, 2^57664665521 is an apocalyptic number.

It is an amenable number.

57664665521 is a deficient number, since it is larger than the sum of its proper divisors (1265531023).

57664665521 is a wasteful number, since it uses less digits than its factorization.

57664665521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287431.

The product of its digits is 9072000, while the sum is 53.

The spelling of 57664665521 in words is "fifty-seven billion, six hundred sixty-four million, six hundred sixty-five thousand, five hundred twenty-one".