72669545 has 8 divisors (see below), whose sum is σ = 93911496. Its totient is φ = 53663616.

The previous prime is 72669539. The next prime is 72669593. The reversal of 72669545 is 54596627.

It can be written as a sum of positive squares in 4 ways, for example, as 4293184 + 68376361 = 2072^2 + 8269^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72669545 - 2⁶ = 72669481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72669496 and 72669505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558932 + ... + 559061.

It is an arithmetic number, because the mean of its divisors is an integer number (11738937).

Almost surely, 2^72669545 is an apocalyptic number.

It is an amenable number.

72669545 is a deficient number, since it is larger than the sum of its proper divisors (21241951).

72669545 is a wasteful number, since it uses less digits than its factorization.

72669545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118011.

The product of its digits is 453600, while the sum is 44.

The square root of 72669545 is about 8524.6433943010. The cubic root of 72669545 is about 417.3023339098.

The spelling of 72669545 in words is "seventy-two million, six hundred sixty-nine thousand, five hundred forty-five".