7666774417 has 4 divisors (see below), whose sum is σ = 8070288880. Its totient is φ = 7263259956.

The previous prime is 7666774387. The next prime is 7666774421. The reversal of 7666774417 is 7144776667.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7144776667 = 7 ⋅1020682381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7666774417 is a prime.

It is a super-2 number, since 2×7666774417² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7666774487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201757203 + ... + 201757240.

It is an arithmetic number, because the mean of its divisors is an integer number (2017572220).

Almost surely, 2^7666774417 is an apocalyptic number.

It is an amenable number.

7666774417 is a deficient number, since it is larger than the sum of its proper divisors (403514463).

7666774417 is a wasteful number, since it uses less digits than its factorization.

7666774417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403514462.

The product of its digits is 8297856, while the sum is 55.

The square root of 7666774417 is about 87560.1188726923. The cubic root of 7666774417 is about 1971.8364708008.

The spelling of 7666774417 in words is "seven billion, six hundred sixty-six million, seven hundred seventy-four thousand, four hundred seventeen".