623727665 has 8 divisors (see below), whose sum is σ = 816516288. Its totient is φ = 453620080.

The previous prime is 623727661. The next prime is 623727667. The reversal of 623727665 is 566727326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623727665 - 2² = 623727661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623727661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5670197 + ... + 5670306.

It is an arithmetic number, because the mean of its divisors is an integer number (102064536).

Almost surely, 2^623727665 is an apocalyptic number.

It is an amenable number.

623727665 is a deficient number, since it is larger than the sum of its proper divisors (192788623).

623727665 is a wasteful number, since it uses less digits than its factorization.

623727665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11340519.

The product of its digits is 635040, while the sum is 44.

The square root of 623727665 is about 24974.5403361103. The cubic root of 623727665 is about 854.4074025981.

The spelling of 623727665 in words is "six hundred twenty-three million, seven hundred twenty-seven thousand, six hundred sixty-five".