3478778677 has 18 divisors (see below), whose sum is σ = 3951240342. Its totient is φ = 3060406800.

The previous prime is 3478778671. The next prime is 3478778707. The reversal of 3478778677 is 7768778743.

It can be written as a sum of positive squares in only one way, i.e., 3400172721 + 78605956 = 58311^2 + 8866^2 .

It is not a de Polignac number, because 3478778677 - 2³ = 3478778669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3478778671) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 101323 + ... + 131239.

Almost surely, 2^3478778677 is an apocalyptic number.

It is an amenable number.

3478778677 is a deficient number, since it is larger than the sum of its proper divisors (472461665).

3478778677 is a wasteful number, since it uses less digits than its factorization.

3478778677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30001 (or 29959 counting only the distinct ones).

The product of its digits is 77446656, while the sum is 64.

The square root of 3478778677 is about 58981.1722247024. The cubic root of 3478778677 is about 1515.2196709355.

The spelling of 3478778677 in words is "three billion, four hundred seventy-eight million, seven hundred seventy-eight thousand, six hundred seventy-seven".