73787668 has 6 divisors (see below), whose sum is σ = 129128426. Its totient is φ = 36893832.

The previous prime is 73787663. The next prime is 73787717. The reversal of 73787668 is 86678737.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 43007364 + 30780304 = 6558^2 + 5548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73787663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223455 + ... + 9223462.

Almost surely, 2^73787668 is an apocalyptic number.

It is an amenable number.

73787668 is a deficient number, since it is larger than the sum of its proper divisors (55340758).

73787668 is a wasteful number, since it uses less digits than its factorization.

73787668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18446921 (or 18446919 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The square root of 73787668 is about 8589.9748544452. The cubic root of 73787668 is about 419.4317106254.

The spelling of 73787668 in words is "seventy-three million, seven hundred eighty-seven thousand, six hundred sixty-eight".