76673721 has 8 divisors (see below), whose sum is σ = 107612320. Its totient is φ = 48425472.

The previous prime is 76673717. The next prime is 76673749. The reversal of 76673721 is 12737667.

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

It is not a de Polignac number, because 76673721 - 2² = 76673717 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 76673721.

It is not an unprimeable number, because it can be changed into a prime (76673711) 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, 672520 + ... + 672633.

It is an arithmetic number, because the mean of its divisors is an integer number (13451540).

Almost surely, 2^76673721 is an apocalyptic number.

It is an amenable number.

76673721 is a deficient number, since it is larger than the sum of its proper divisors (30938599).

76673721 is a wasteful number, since it uses less digits than its factorization.

76673721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345175.

The product of its digits is 74088, while the sum is 39.

The square root of 76673721 is about 8756.3531792636. The cubic root of 76673721 is about 424.8303285807.

The spelling of 76673721 in words is "seventy-six million, six hundred seventy-three thousand, seven hundred twenty-one".