66771215001662 has 4 divisors (see below), whose sum is σ = 100156822502496. Its totient is φ = 33385607500830.

The previous prime is 66771215001641. The next prime is 66771215001713. The reversal of 66771215001662 is 26610051217766.

66771215001662 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66771215001662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16692803750414 + ... + 16692803750417.

It is an arithmetic number, because the mean of its divisors is an integer number (25039205625624).

Almost surely, 2^{66771215001662} is an apocalyptic number.

66771215001662 is a deficient number, since it is larger than the sum of its proper divisors (33385607500834).

66771215001662 is a wasteful number, since it uses less digits than its factorization.

66771215001662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33385607500833.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 66771215001662 in words is "sixty-six trillion, seven hundred seventy-one billion, two hundred fifteen million, one thousand, six hundred sixty-two".