1366165672 has 16 divisors (see below), whose sum is σ = 2562226740. Its totient is φ = 682905216.

The previous prime is 1366165667. The next prime is 1366165739. The reversal of 1366165672 is 2765616631.

It can be written as a sum of positive squares in 2 ways, for example, as 1310005636 + 56160036 = 36194^2 + 7494^2 .

It is a super-3 number, since 3×1366165672³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13948 + ... + 54100.

Almost surely, 2^1366165672 is an apocalyptic number.

It is an amenable number.

1366165672 is a deficient number, since it is larger than the sum of its proper divisors (1196061068).

1366165672 is a wasteful number, since it uses less digits than its factorization.

1366165672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44412 (or 44408 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 1366165672 is about 36961.6784250932. The cubic root of 1366165672 is about 1109.6034273067.

The spelling of 1366165672 in words is "one billion, three hundred sixty-six million, one hundred sixty-five thousand, six hundred seventy-two".