663737166 has 20 divisors (see below), whose sum is σ = 1487263272. Its totient is φ = 221245668.

The previous prime is 663737143. The next prime is 663737167. The reversal of 663737166 is 661737366.

663737166 is a `hidden beast` number, since 6 + 637 + 3 + 7 + 1 + 6 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663737167) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2048410 + ... + 2048733.

Almost surely, 2^663737166 is an apocalyptic number.

663737166 is an abundant number, since it is smaller than the sum of its proper divisors (823526106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663737166 is a wasteful number, since it uses less digits than its factorization.

663737166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097157 (or 4097148 counting only the distinct ones).

The product of its digits is 571536, while the sum is 45.

The square root of 663737166 is about 25763.0969799828. The cubic root of 663737166 is about 872.2990086092.

The spelling of 663737166 in words is "six hundred sixty-three million, seven hundred thirty-seven thousand, one hundred sixty-six".