6642029474077 has 4 divisors (see below), whose sum is σ = 6642733759776. Its totient is φ = 6641325188380.

The previous prime is 6642029474053. The next prime is 6642029474081. The reversal of 6642029474077 is 7704749202466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6642029474077 - 2⁷ = 6642029473949 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642029414077) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 352128703 + ... + 352147564.

It is an arithmetic number, because the mean of its divisors is an integer number (1660683439944).

Almost surely, 2^{6642029474077} is an apocalyptic number.

It is an amenable number.

6642029474077 is a deficient number, since it is larger than the sum of its proper divisors (704285699).

6642029474077 is an equidigital number, since it uses as much as digits as its factorization.

6642029474077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704285698.

The product of its (nonzero) digits is 28449792, while the sum is 58.

The spelling of 6642029474077 in words is "six trillion, six hundred forty-two billion, twenty-nine million, four hundred seventy-four thousand, seventy-seven".