67997764 has 24 divisors (see below), whose sum is σ = 121284800. Its totient is φ = 33349536.

The previous prime is 67997747. The next prime is 67997771. The reversal of 67997764 is 46779976.

It is a happy number.

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, 93169 + ... + 93895.

Almost surely, 2^67997764 is an apocalyptic number.

It is an amenable number.

67997764 is a deficient number, since it is larger than the sum of its proper divisors (53287036).

67997764 is a wasteful number, since it uses less digits than its factorization.

67997764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1145 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 55.

The square root of 67997764 is about 8246.0756727064. The cubic root of 67997764 is about 408.1610363286.

The spelling of 67997764 in words is "sixty-seven million, nine hundred ninety-seven thousand, seven hundred sixty-four".