747112661 has 4 divisors (see below), whose sum is σ = 786434400. Its totient is φ = 707790924.

The previous prime is 747112637. The next prime is 747112669. The reversal of 747112661 is 166211747.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166211747 = 13 ⋅12785519.

It is a cyclic number.

It is not a de Polignac number, because 747112661 - 2¹⁰ = 747111637 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 (747112669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19660841 + ... + 19660878.

It is an arithmetic number, because the mean of its divisors is an integer number (196608600).

Almost surely, 2^747112661 is an apocalyptic number.

It is an amenable number.

747112661 is a deficient number, since it is larger than the sum of its proper divisors (39321739).

747112661 is a wasteful number, since it uses less digits than its factorization.

747112661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39321738.

The product of its digits is 14112, while the sum is 35.

The square root of 747112661 is about 27333.3616849446. The cubic root of 747112661 is about 907.3928763252.

The spelling of 747112661 in words is "seven hundred forty-seven million, one hundred twelve thousand, six hundred sixty-one".