20070166066 has 4 divisors (see below), whose sum is σ = 30105249102. Its totient is φ = 10035083032.

The previous prime is 20070166063. The next prime is 20070166073. The reversal of 20070166066 is 66066107002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17695650625 + 2374515441 = 133025^2 + 48729^2 .

It is not an unprimeable number, because it can be changed into a prime (20070166063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5017541515 + ... + 5017541518.

Almost surely, 2^20070166066 is an apocalyptic number.

20070166066 is a deficient number, since it is larger than the sum of its proper divisors (10035083036).

20070166066 is a wasteful number, since it uses less digits than its factorization.

20070166066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035083035.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 20070166066 in words is "twenty billion, seventy million, one hundred sixty-six thousand, sixty-six".