675409779 has 48 divisors (see below), whose sum is σ = 1164633120. Its totient is φ = 385228800.

The previous prime is 675409771. The next prime is 675409799. The reversal of 675409779 is 977904576.

It is a happy number.

675409779 is a `hidden beast` number, since 6 + 7 + 540 + 97 + 7 + 9 = 666.

It is not a de Polignac number, because 675409779 - 2³ = 675409771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (675409771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49459 + ... + 61619.

It is an arithmetic number, because the mean of its divisors is an integer number (24263190).

Almost surely, 2^675409779 is an apocalyptic number.

675409779 is a deficient number, since it is larger than the sum of its proper divisors (489223341).

675409779 is a wasteful number, since it uses less digits than its factorization.

675409779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12209 (or 12192 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 54.

The square root of 675409779 is about 25988.6471175396. The cubic root of 675409779 is about 877.3827968236.

The spelling of 675409779 in words is "six hundred seventy-five million, four hundred nine thousand, seven hundred seventy-nine".