66663948 has 24 divisors (see below), whose sum is σ = 167514928. Its totient is φ = 20511936.

The previous prime is 66663931. The next prime is 66663967. The reversal of 66663948 is 84936666.

It is a junction number, because it is equal to n+sod(n) for n = 66663897 and 66663906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213511 + ... + 213822.

Almost surely, 2^66663948 is an apocalyptic number.

It is an amenable number.

66663948 is an abundant number, since it is smaller than the sum of its proper divisors (100850980).

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

66663948 is a wasteful number, since it uses less digits than its factorization.

66663948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427353 (or 427351 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 66663948 is about 8164.7993239271. The cubic root of 66663948 is about 405.4746211367.

The spelling of 66663948 in words is "sixty-six million, six hundred sixty-three thousand, nine hundred forty-eight".