73664370 has 128 divisors (see below), whose sum is σ = 218695680. Its totient is φ = 17521920.

The previous prime is 73664359. The next prime is 73664389. The reversal of 73664370 is 7346637.

73664370 is a `hidden beast` number, since 7 + 3 + 6 + 643 + 7 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108472 + ... + 109148.

It is an arithmetic number, because the mean of its divisors is an integer number (1708560).

Almost surely, 2^73664370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73664370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109347840).

73664370 is an abundant number, since it is smaller than the sum of its proper divisors (145031310).

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

73664370 is a wasteful number, since it uses less digits than its factorization.

73664370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 36.

The square root of 73664370 is about 8582.7949992995. The cubic root of 73664370 is about 419.1979591768.

The spelling of 73664370 in words is "seventy-three million, six hundred sixty-four thousand, three hundred seventy".