73661530 has 8 divisors (see below), whose sum is σ = 132590772. Its totient is φ = 29464608.

The previous prime is 73661513. The next prime is 73661531. The reversal of 73661530 is 3516637.

It can be written as a sum of positive squares in 2 ways, for example, as 69405561 + 4255969 = 8331^2 + 2063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 73661492 and 73661501.

It is not an unprimeable number, because it can be changed into a prime (73661531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3683067 + ... + 3683086.

Almost surely, 2^73661530 is an apocalyptic number.

73661530 is a deficient number, since it is larger than the sum of its proper divisors (58929242).

73661530 is a wasteful number, since it uses less digits than its factorization.

73661530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366160.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 73661530 is about 8582.6295504350. The cubic root of 73661530 is about 419.1925719614.

The spelling of 73661530 in words is "seventy-three million, six hundred sixty-one thousand, five hundred thirty".