66397948 has 12 divisors (see below), whose sum is σ = 116531800. Its totient is φ = 33103152.

The previous prime is 66397921. The next prime is 66397949. The reversal of 66397948 is 84979366.

It is a super-2 number, since 2×66397948² = 8817374997221408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66397895 and 66397904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66397949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22386 + ... + 25177.

Almost surely, 2^66397948 is an apocalyptic number.

It is an amenable number.

66397948 is a deficient number, since it is larger than the sum of its proper divisors (50133852).

66397948 is a wasteful number, since it uses less digits than its factorization.

66397948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47916 (or 47914 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The square root of 66397948 is about 8148.4936031146. The cubic root of 66397948 is about 404.9345990009.

The spelling of 66397948 in words is "sixty-six million, three hundred ninety-seven thousand, nine hundred forty-eight".