76644121 has 8 divisors (see below), whose sum is σ = 80415488. Its totient is φ = 72954000.

The previous prime is 76644097. The next prime is 76644133. The reversal of 76644121 is 12144667.

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

It is a cyclic number.

It is not a de Polignac number, because 76644121 - 2⁵ = 76644089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (76644521) 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, 18375 + ... + 22156.

It is an arithmetic number, because the mean of its divisors is an integer number (10051936).

Almost surely, 2^76644121 is an apocalyptic number.

It is an amenable number.

76644121 is a deficient number, since it is larger than the sum of its proper divisors (3771367).

76644121 is a wasteful number, since it uses less digits than its factorization.

76644121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40623.

The product of its digits is 8064, while the sum is 31.

The square root of 76644121 is about 8754.6628147519. The cubic root of 76644121 is about 424.7756527583.

Adding to 76644121 its reverse (12144667), we get a palindrome (88788788).

The spelling of 76644121 in words is "seventy-six million, six hundred forty-four thousand, one hundred twenty-one".