20607066505 has 8 divisors (see below), whose sum is σ = 24812879112. Its totient is φ = 16429387008.

The previous prime is 20607066463. The next prime is 20607066533. The reversal of 20607066505 is 50566070602.

It can be written as a sum of positive squares in 4 ways, for example, as 2673303616 + 17933762889 = 51704^2 + 133917^2 .

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 20607066505 - 2⁷ = 20607066377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7031664 + ... + 7034593.

It is an arithmetic number, because the mean of its divisors is an integer number (3101609889).

Almost surely, 2^20607066505 is an apocalyptic number.

It is an amenable number.

20607066505 is a deficient number, since it is larger than the sum of its proper divisors (4205812607).

20607066505 is a wasteful number, since it uses less digits than its factorization.

20607066505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14066555.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 20607066505 in words is "twenty billion, six hundred seven million, sixty-six thousand, five hundred five".