66962768 has 10 divisors (see below), whose sum is σ = 129740394. Its totient is φ = 33481376.

The previous prime is 66962767. The next prime is 66962771. The reversal of 66962768 is 86726966.

It can be written as a sum of positive squares in only one way, i.e., 37063744 + 29899024 = 6088^2 + 5468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66962767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2092571 + ... + 2092602.

Almost surely, 2^66962768 is an apocalyptic number.

It is an amenable number.

66962768 is a deficient number, since it is larger than the sum of its proper divisors (62777626).

66962768 is a wasteful number, since it uses less digits than its factorization.

66962768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185181 (or 4185175 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 66962768 is about 8183.0781494496. The cubic root of 66962768 is about 406.0795624931.

The spelling of 66962768 in words is "sixty-six million, nine hundred sixty-two thousand, seven hundred sixty-eight".