130669778 has 18 divisors (see below), whose sum is σ = 200849061. Its totient is φ = 63758704.

The previous prime is 130669753. The next prime is 130669807. The reversal of 130669778 is 877966031.

It can be written as a sum of positive squares in 2 ways, for example, as 129663769 + 1006009 = 11387^2 + 1003^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8083.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 953726 + ... + 953862.

Almost surely, 2^130669778 is an apocalyptic number.

130669778 is a deficient number, since it is larger than the sum of its proper divisors (70179283).

130669778 is an frugal number, since it uses more digits than its factorization.

130669778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 130669778 is about 11431.0882246617. The cubic root of 130669778 is about 507.4482016584.

The spelling of 130669778 in words is "one hundred thirty million, six hundred sixty-nine thousand, seven hundred seventy-eight".