745774661 has 4 divisors (see below), whose sum is σ = 746013312. Its totient is φ = 745536012.

The previous prime is 745774633. The next prime is 745774669. The reversal of 745774661 is 166477547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 745774661 - 2¹⁸ = 745512517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745774669) 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, 114575 + ... + 120908.

It is an arithmetic number, because the mean of its divisors is an integer number (186503328).

Almost surely, 2^745774661 is an apocalyptic number.

It is an amenable number.

745774661 is a deficient number, since it is larger than the sum of its proper divisors (238651).

745774661 is a wasteful number, since it uses less digits than its factorization.

745774661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238650.

The product of its digits is 987840, while the sum is 47.

The square root of 745774661 is about 27308.8751324547. The cubic root of 745774661 is about 906.8508709829.

The spelling of 745774661 in words is "seven hundred forty-five million, seven hundred seventy-four thousand, six hundred sixty-one".