6661772774342 has 16 divisors (see below), whose sum is σ = 12091957305120. Its totient is φ = 2687101623168.

The previous prime is 6661772774341. The next prime is 6661772774353. The reversal of 6661772774342 is 2434772771666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661772774341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13995320717 + ... + 13995321192.

It is an arithmetic number, because the mean of its divisors is an integer number (755747331570).

Almost surely, 2^{6661772774342} is an apocalyptic number.

6661772774342 is a deficient number, since it is larger than the sum of its proper divisors (5430184530778).

6661772774342 is a wasteful number, since it uses less digits than its factorization.

6661772774342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27990641935.

The product of its digits is 99574272, while the sum is 62.

The spelling of 6661772774342 in words is "six trillion, six hundred sixty-one billion, seven hundred seventy-two million, seven hundred seventy-four thousand, three hundred forty-two".