74477666677447 has 4 divisors (see below), whose sum is σ = 81248363648136. Its totient is φ = 67706969706760.

The previous prime is 74477666677429. The next prime is 74477666677499.

74477666677447 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 74477666677447 - 2¹⁵ = 74477666644679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74477666677147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385348485328 + ... + 3385348485349.

It is an arithmetic number, because the mean of its divisors is an integer number (20312090912034).

Almost surely, 2^{74477666677447} is an apocalyptic number.

74477666677447 is a deficient number, since it is larger than the sum of its proper divisors (6770696970689).

74477666677447 is a wasteful number, since it uses less digits than its factorization.

74477666677447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770696970688.

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

The spelling of 74477666677447 in words is "seventy-four trillion, four hundred seventy-seven billion, six hundred sixty-six million, six hundred seventy-seven thousand, four hundred forty-seven".