66070020171002 has 4 divisors (see below), whose sum is σ = 99105030256506. Its totient is φ = 33035010085500.

The previous prime is 66070020170989. The next prime is 66070020171011. The reversal of 66070020171002 is 20017102007066.

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., 53615183973121 + 12454836197881 = 7322239^2 + 3529141^2 .

It is a super-2 number, since 2×66070020171002² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66070020171002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16517505042749 + ... + 16517505042752.

Almost surely, 2^{66070020171002} is an apocalyptic number.

66070020171002 is a deficient number, since it is larger than the sum of its proper divisors (33035010085504).

66070020171002 is a wasteful number, since it uses less digits than its factorization.

66070020171002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33035010085503.

The product of its (nonzero) digits is 7056, while the sum is 32.

Adding to 66070020171002 its reverse (20017102007066), we get a palindrome (86087122178068).

The spelling of 66070020171002 in words is "sixty-six trillion, seventy billion, twenty million, one hundred seventy-one thousand, two".