66747477474766 has 96 divisors (see below), whose sum is σ = 118180977276096. Its totient is φ = 28149161779200.

The previous prime is 66747477474763. The next prime is 66747477474809.

66747477474766 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66747477474766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66747477474763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4386367990 + ... + 4386383206.

It is an arithmetic number, because the mean of its divisors is an integer number (1231051846626).

Almost surely, 2^{66747477474766} is an apocalyptic number.

66747477474766 is a deficient number, since it is larger than the sum of its proper divisors (51433499801330).

66747477474766 is a wasteful number, since it uses less digits than its factorization.

66747477474766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30346 (or 30335 counting only the distinct ones).

The product of its digits is 39033114624, while the sum is 82.

The spelling of 66747477474766 in words is "sixty-six trillion, seven hundred forty-seven billion, four hundred seventy-seven million, four hundred seventy-four thousand, seven hundred sixty-six".