2775457661 has 8 divisors (see below), whose sum is σ = 2989477920. Its totient is φ = 2568231792.

The previous prime is 2775457651. The next prime is 2775457721. The reversal of 2775457661 is 1667545772.

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

It is a cyclic number.

It is not a de Polignac number, because 2775457661 - 2¹⁰ = 2775456637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775457651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697750 + ... + 1699383.

It is an arithmetic number, because the mean of its divisors is an integer number (373684740).

Almost surely, 2^2775457661 is an apocalyptic number.

It is an amenable number.

2775457661 is a deficient number, since it is larger than the sum of its proper divisors (214020259).

2775457661 is a wasteful number, since it uses less digits than its factorization.

2775457661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397195.

The product of its digits is 2469600, while the sum is 50.

The square root of 2775457661 is about 52682.6125111502. The cubic root of 2775457661 is about 1405.3296273665.

The spelling of 2775457661 in words is "two billion, seven hundred seventy-five million, four hundred fifty-seven thousand, six hundred sixty-one".