20666977162 has 8 divisors (see below), whose sum is σ = 33385116996. Its totient is φ = 9538604832.

The previous prime is 20666977159. The next prime is 20666977183. The reversal of 20666977162 is 26177966602.

It can be written as a sum of positive squares in 2 ways, for example, as 20335045201 + 331931961 = 142601^2 + 18219^2 .

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

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, 397441843 + ... + 397441894.

Almost surely, 2^20666977162 is an apocalyptic number.

20666977162 is a deficient number, since it is larger than the sum of its proper divisors (12718139834).

20666977162 is a wasteful number, since it uses less digits than its factorization.

20666977162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794883752.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 20666977162 in words is "twenty billion, six hundred sixty-six million, nine hundred seventy-seven thousand, one hundred sixty-two".