75667409 has 8 divisors (see below), whose sum is σ = 78413160. Its totient is φ = 72930816.

The previous prime is 75667381. The next prime is 75667433. The reversal of 75667409 is 90476657.

It can be written as a sum of positive squares in 4 ways, for example, as 2650384 + 73017025 = 1628^2 + 8545^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75667409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 75667409.

It is not an unprimeable number, because it can be changed into a prime (75667439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17579 + ... + 21455.

It is an arithmetic number, because the mean of its divisors is an integer number (9801645).

Almost surely, 2^75667409 is an apocalyptic number.

It is an amenable number.

75667409 is a deficient number, since it is larger than the sum of its proper divisors (2745751).

75667409 is a wasteful number, since it uses less digits than its factorization.

75667409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4579.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 75667409 is about 8698.7015697747. The cubic root of 75667409 is about 422.9635615526.

The spelling of 75667409 in words is "seventy-five million, six hundred sixty-seven thousand, four hundred nine".