20075654666 has 8 divisors (see below), whose sum is σ = 31151878020. Its totient is φ = 9691695328.

The previous prime is 20075654597. The next prime is 20075654681. The reversal of 20075654666 is 66645657002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19077410641 + 998244025 = 138121^2 + 31595^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20075654666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173065931 + ... + 173066046.

Almost surely, 2^20075654666 is an apocalyptic number.

20075654666 is a deficient number, since it is larger than the sum of its proper divisors (11076223354).

20075654666 is a wasteful number, since it uses less digits than its factorization.

20075654666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346132008.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 20075654666 in words is "twenty billion, seventy-five million, six hundred fifty-four thousand, six hundred sixty-six".