75721347675 has 36 divisors (see below), whose sum is σ = 135645898960. Its totient is φ = 40378599360.

The previous prime is 75721347673. The next prime is 75721347697. The reversal of 75721347675 is 57674312757.

75721347675 is a `hidden beast` number, since 7 + 572 + 1 + 3 + 4 + 7 + 67 + 5 = 666.

It is not a de Polignac number, because 75721347675 - 2¹ = 75721347673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75721347673) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1730922 + ... + 1774128.

Almost surely, 2^75721347675 is an apocalyptic number.

75721347675 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

75721347675 is a deficient number, since it is larger than the sum of its proper divisors (59924551285).

75721347675 is a wasteful number, since it uses less digits than its factorization.

75721347675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51012 (or 51004 counting only the distinct ones).

The product of its digits is 8643600, while the sum is 54.

The spelling of 75721347675 in words is "seventy-five billion, seven hundred twenty-one million, three hundred forty-seven thousand, six hundred seventy-five".