74320668 has 36 divisors (see below), whose sum is σ = 198918720. Its totient is φ = 23316096.

The previous prime is 74320667. The next prime is 74320693. The reversal of 74320668 is 86602347.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74320661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60108 + ... + 61331.

It is an arithmetic number, because the mean of its divisors is an integer number (5525520).

Almost surely, 2^74320668 is an apocalyptic number.

It is an amenable number.

74320668 is an abundant number, since it is smaller than the sum of its proper divisors (124598052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74320668 is a wasteful number, since it uses less digits than its factorization.

74320668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121466 (or 121461 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 74320668 is about 8620.9435678469. The cubic root of 74320668 is about 420.4392004253.

The spelling of 74320668 in words is "seventy-four million, three hundred twenty thousand, six hundred sixty-eight".