74751681 has 8 divisors (see below), whose sum is σ = 104914720. Its totient is φ = 47211552.

The previous prime is 74751671. The next prime is 74751707. The reversal of 74751681 is 18615747.

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

It is not a de Polignac number, because 74751681 - 2⁷ = 74751553 is a prime.

It is a super-2 number, since 2×74751681² = 11175627624651522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74751631) 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 7 ways as a sum of consecutive naturals, for example, 655660 + ... + 655773.

It is an arithmetic number, because the mean of its divisors is an integer number (13114340).

Almost surely, 2^74751681 is an apocalyptic number.

It is an amenable number.

74751681 is a deficient number, since it is larger than the sum of its proper divisors (30163039).

74751681 is a wasteful number, since it uses less digits than its factorization.

74751681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311455.

The product of its digits is 47040, while the sum is 39.

The square root of 74751681 is about 8645.9054470888. The cubic root of 74751681 is about 421.2503950311.

The spelling of 74751681 in words is "seventy-four million, seven hundred fifty-one thousand, six hundred eighty-one".