747795661 has 2 divisors, whose sum is σ = 747795662. Its totient is φ = 747795660.

The previous prime is 747795623. The next prime is 747795689. The reversal of 747795661 is 166597747.

747795661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 746928900 + 866761 = 27330^2 + 931^2 .

It is an emirp because it is prime and its reverse (166597747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 747795661 - 2²¹ = 745698509 is a prime.

It is a super-2 number, since 2×747795661² = 1118396701220853842, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 747795599 and 747795608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (747798661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373897830 + 373897831.

It is an arithmetic number, because the mean of its divisors is an integer number (373897831).

Almost surely, 2^747795661 is an apocalyptic number.

It is an amenable number.

747795661 is a deficient number, since it is larger than the sum of its proper divisors (1).

747795661 is an equidigital number, since it uses as much as digits as its factorization.

747795661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 52.

The square root of 747795661 is about 27345.8527202938. The cubic root of 747795661 is about 907.6693007554.

The spelling of 747795661 in words is "seven hundred forty-seven million, seven hundred ninety-five thousand, six hundred sixty-one".