66890948 has 6 divisors (see below), whose sum is σ = 117059166. Its totient is φ = 33445472.

The previous prime is 66890939. The next prime is 66890951. The reversal of 66890948 is 84909866.

It can be written as a sum of positive squares in only one way, i.e., 66716224 + 174724 = 8168^2 + 418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66890896 and 66890905.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361365 + ... + 8361372.

It is an arithmetic number, because the mean of its divisors is an integer number (19509861).

Almost surely, 2^66890948 is an apocalyptic number.

It is an amenable number.

66890948 is a deficient number, since it is larger than the sum of its proper divisors (50168218).

66890948 is a wasteful number, since it uses less digits than its factorization.

66890948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16722741 (or 16722739 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 66890948 is about 8178.6886479435. The cubic root of 66890948 is about 405.9343322008.

The spelling of 66890948 in words is "sixty-six million, eight hundred ninety thousand, nine hundred forty-eight".