1306666179025 has 9 divisors (see below), whose sum is σ = 1620273149211. Its totient is φ = 1045328370840.

The previous prime is 1306666179011. The next prime is 1306666179107. The reversal of 1306666179025 is 5209716666031.

The square root of 1306666179025 is 1143095.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 470399824449 + 836266354576 = 685857^2 + 914476^2 .

It is not a de Polignac number, because 1306666179025 - 2³⁷ = 1169227225553 is a prime.

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, 5601166 + ... + 5829784.

Almost surely, 2^{1306666179025} is an apocalyptic number.

1306666179025 is the 1143095-th square number.

1306666179025 is the 571548-th centered octagonal number.

It is an amenable number.

1306666179025 is a deficient number, since it is larger than the sum of its proper divisors (313606970186).

1306666179025 is an frugal number, since it uses more digits than its factorization.

1306666179025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457248 (or 228624 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 1306666179025 in words is "one trillion, three hundred six billion, six hundred sixty-six million, one hundred seventy-nine thousand, twenty-five".