745666547 has 4 divisors (see below), whose sum is σ = 752265480. Its totient is φ = 739067616.

The previous prime is 745666511. The next prime is 745666553.

745666547 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 745666547 - 2¹² = 745662451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745666495 and 745666504.

It is not an unprimeable number, because it can be changed into a prime (745666567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3299297 + ... + 3299522.

It is an arithmetic number, because the mean of its divisors is an integer number (188066370).

Almost surely, 2^745666547 is an apocalyptic number.

745666547 is a deficient number, since it is larger than the sum of its proper divisors (6598933).

745666547 is a wasteful number, since it uses less digits than its factorization.

745666547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6598932.

The product of its digits is 4233600, while the sum is 50.

The square root of 745666547 is about 27306.8955943366. The cubic root of 745666547 is about 906.8070471944.

The spelling of 745666547 in words is "seven hundred forty-five million, six hundred sixty-six thousand, five hundred forty-seven".