6662609773 has 4 divisors (see below), whose sum is σ = 6665415100. Its totient is φ = 6659804448.

The previous prime is 6662609761. The next prime is 6662609777. The reversal of 6662609773 is 3779062666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3779062666 = 2 ⋅1889531333.

It can be written as a sum of positive squares in 2 ways, for example, as 1677967369 + 4984642404 = 40963^2 + 70602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6662609773 is a prime.

It is a super-2 number, since 2×6662609773² = 88780737974550223058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6662609773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662609777) 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, 1399098 + ... + 1403851.

It is an arithmetic number, because the mean of its divisors is an integer number (1666353775).

Almost surely, 2^6662609773 is an apocalyptic number.

It is an amenable number.

6662609773 is a deficient number, since it is larger than the sum of its proper divisors (2805327).

6662609773 is a wasteful number, since it uses less digits than its factorization.

6662609773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805326.

The product of its (nonzero) digits is 3429216, while the sum is 52.

The square root of 6662609773 is about 81624.8110135638. The cubic root of 6662609773 is about 1881.6902119856.

The spelling of 6662609773 in words is "six billion, six hundred sixty-two million, six hundred nine thousand, seven hundred seventy-three".