123777663 has 16 divisors (see below), whose sum is σ = 175136256. Its totient is φ = 77490560.

The previous prime is 123777659. The next prime is 123777671. The reversal of 123777663 is 366777321.

It is a cyclic number.

It is not a de Polignac number, because 123777663 - 2² = 123777659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123777613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22570 + ... + 27512.

It is an arithmetic number, because the mean of its divisors is an integer number (10946016).

Almost surely, 2^123777663 is an apocalyptic number.

123777663 is a deficient number, since it is larger than the sum of its proper divisors (51358593).

123777663 is a wasteful number, since it uses less digits than its factorization.

123777663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454.

The product of its digits is 222264, while the sum is 42.

The square root of 123777663 is about 11125.5410205527. The cubic root of 123777663 is about 498.3648759007.

The spelling of 123777663 in words is "one hundred twenty-three million, seven hundred seventy-seven thousand, six hundred sixty-three".