1366166545 has 8 divisors (see below), whose sum is σ = 1677525696. Its totient is φ = 1067516016.

The previous prime is 1366166507. The next prime is 1366166567. The reversal of 1366166545 is 5456616631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1366166545 - 2²⁹ = 829295633 is a prime.

It is a super-2 number, since 2×1366166545² = 3732822057354474050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3176917 + ... + 3177346.

It is an arithmetic number, because the mean of its divisors is an integer number (209690712).

Almost surely, 2^1366166545 is an apocalyptic number.

It is an amenable number.

1366166545 is a deficient number, since it is larger than the sum of its proper divisors (311359151).

1366166545 is an equidigital number, since it uses as much as digits as its factorization.

1366166545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354311.

The product of its digits is 388800, while the sum is 43.

The square root of 1366166545 is about 36961.6902346200. The cubic root of 1366166545 is about 1109.6036636576.

The spelling of 1366166545 in words is "one billion, three hundred sixty-six million, one hundred sixty-six thousand, five hundred forty-five".