773661 has 24 divisors (see below), whose sum is σ = 1267680. Its totient is φ = 417312.

The previous prime is 773659. The next prime is 773681. The reversal of 773661 is 166377.

It is not a de Polignac number, because 773661 - 2¹ = 773659 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 773661.

It is not an unprimeable number, because it can be changed into a prime (773611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2655 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (52820).

2⁷⁷³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

773661 is a deficient number, since it is larger than the sum of its proper divisors (494019).

773661 is a wasteful number, since it uses less digits than its factorization.

773661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 306 counting only the distinct ones).

The product of its digits is 5292, while the sum is 30.

The square root of 773661 is about 879.5800134155. The cubic root of 773661 is about 91.8015966990.

The spelling of 773661 in words is "seven hundred seventy-three thousand, six hundred sixty-one".