75621663 has 12 divisors (see below), whose sum is σ = 117633880. Its totient is φ = 46536336.

The previous prime is 75621659. The next prime is 75621709. The reversal of 75621663 is 36612657.

It is not a de Polignac number, because 75621663 - 2² = 75621659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75621613) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 323053 + ... + 323286.

Almost surely, 2^75621663 is an apocalyptic number.

75621663 is a deficient number, since it is larger than the sum of its proper divisors (42012217).

75621663 is a wasteful number, since it uses less digits than its factorization.

75621663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646358 (or 646355 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 75621663 is about 8696.0716993364. The cubic root of 75621663 is about 422.8783078003.

The spelling of 75621663 in words is "seventy-five million, six hundred twenty-one thousand, six hundred sixty-three".