276766306405 has 8 divisors (see below), whose sum is σ = 351656012952. Its totient is φ = 208388748288.

The previous prime is 276766306339. The next prime is 276766306429. The reversal of 276766306405 is 504603667672.

It can be written as a sum of positive squares in 4 ways, for example, as 42264369889 + 234501936516 = 205583^2 + 484254^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-276766306405 is a prime.

It is a super-2 number, since 2×276766306405² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1628037012 + ... + 1628037181.

It is an arithmetic number, because the mean of its divisors is an integer number (43957001619).

Almost surely, 2^276766306405 is an apocalyptic number.

It is an amenable number.

276766306405 is a deficient number, since it is larger than the sum of its proper divisors (74889706547).

276766306405 is a wasteful number, since it uses less digits than its factorization.

276766306405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256074215.

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 276766306405 in words is "two hundred seventy-six billion, seven hundred sixty-six million, three hundred six thousand, four hundred five".