66276773 has 6 divisors (see below), whose sum is σ = 67202514. Its totient is φ = 65363616.

The previous prime is 66276757. The next prime is 66276781. The reversal of 66276773 is 37767266.

It can be written as a sum of positive squares in 3 ways, for example, as 1747684 + 64529089 = 1322^2 + 8033^2 .

It is not a de Polignac number, because 66276773 - 2⁴ = 66276757 is a prime.

It is a super-2 number, since 2×66276773² = 8785221278587058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66276703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 890 + ... + 11547.

It is an arithmetic number, because the mean of its divisors is an integer number (11200419).

Almost surely, 2^66276773 is an apocalyptic number.

It is an amenable number.

66276773 is a deficient number, since it is larger than the sum of its proper divisors (925741).

66276773 is an equidigital number, since it uses as much as digits as its factorization.

66276773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12583 (or 12510 counting only the distinct ones).

The product of its digits is 444528, while the sum is 44.

The square root of 66276773 is about 8141.0547842402. The cubic root of 66276773 is about 404.6881163350.

The spelling of 66276773 in words is "sixty-six million, two hundred seventy-six thousand, seven hundred seventy-three".