663623373 has 16 divisors (see below), whose sum is σ = 1070720640. Its totient is φ = 356906496.

The previous prime is 663623351. The next prime is 663623383. The reversal of 663623373 is 373326366.

It is not a de Polignac number, because 663623373 - 2¹³ = 663615181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663623383) 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, 929088 + ... + 929801.

It is an arithmetic number, because the mean of its divisors is an integer number (66920040).

Almost surely, 2^663623373 is an apocalyptic number.

It is an amenable number.

663623373 is a deficient number, since it is larger than the sum of its proper divisors (407097267).

663623373 is a wasteful number, since it uses less digits than its factorization.

663623373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858916.

The product of its digits is 244944, while the sum is 39.

The square root of 663623373 is about 25760.8884357663. Note that the first 3 decimals coincide. The cubic root of 663623373 is about 872.2491559469.

The spelling of 663623373 in words is "six hundred sixty-three million, six hundred twenty-three thousand, three hundred seventy-three".