3777777725 has 12 divisors (see below), whose sum is σ = 4772831796. Its totient is φ = 2965198080.

The previous prime is 3777777701. The next prime is 3777777767. The reversal of 3777777725 is 5277777773.

It can be written as a sum of positive squares in 6 ways, for example, as 379587289 + 3398190436 = 19483^2 + 58294^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3777777725 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1424252 + ... + 1426901.

It is an arithmetic number, because the mean of its divisors is an integer number (397735983).

Almost surely, 2^3777777725 is an apocalyptic number.

It is an amenable number.

3777777725 is a deficient number, since it is larger than the sum of its proper divisors (995054071).

3777777725 is a wasteful number, since it uses less digits than its factorization.

3777777725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851216 (or 2851211 counting only the distinct ones).

The product of its digits is 24706290, while the sum is 59.

The square root of 3777777725 is about 61463.6292859444. The cubic root of 3777777725 is about 1557.4429021990.

The spelling of 3777777725 in words is "three billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, seven hundred twenty-five".