76316621 has 16 divisors (see below), whose sum is σ = 83317248. Its totient is φ = 69619200.

The previous prime is 76316567. The next prime is 76316633. The reversal of 76316621 is 12661367.

It is a cyclic number.

It is not a de Polignac number, because 76316621 - 2⁶ = 76316557 is a prime.

It is a super-3 number, since 3×76316621³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76316641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155186 + ... + 155676.

It is an arithmetic number, because the mean of its divisors is an integer number (5207328).

Almost surely, 2^76316621 is an apocalyptic number.

It is an amenable number.

76316621 is a deficient number, since it is larger than the sum of its proper divisors (7000627).

76316621 is a wasteful number, since it uses less digits than its factorization.

76316621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772.

The product of its digits is 9072, while the sum is 32.

The square root of 76316621 is about 8735.9384727687. The cubic root of 76316621 is about 424.1697674417.

Adding to 76316621 its reverse (12661367), we get a palindrome (88977988).

The spelling of 76316621 in words is "seventy-six million, three hundred sixteen thousand, six hundred twenty-one".