20670561662 has 16 divisors (see below), whose sum is σ = 32657384400. Its totient is φ = 9785422080.

The previous prime is 20670561607. The next prime is 20670561689. The reversal of 20670561662 is 26616507602.

It is a congruent 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, 99539 + ... + 226382.

It is an arithmetic number, because the mean of its divisors is an integer number (2041086525).

Almost surely, 2^20670561662 is an apocalyptic number.

20670561662 is a deficient number, since it is larger than the sum of its proper divisors (11986822738).

20670561662 is a wasteful number, since it uses less digits than its factorization.

20670561662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327611.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 20670561662 in words is "twenty billion, six hundred seventy million, five hundred sixty-one thousand, six hundred sixty-two".