76605921 has 24 divisors (see below), whose sum is σ = 126696960. Its totient is φ = 43693056.

The previous prime is 76605913. The next prime is 76605923. The reversal of 76605921 is 12950667.

76605921 is a `hidden beast` number, since 7 + 6 + 60 + 592 + 1 = 666.

It is not a de Polignac number, because 76605921 - 2³ = 76605913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76605923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53665 + ... + 55073.

It is an arithmetic number, because the mean of its divisors is an integer number (5279040).

Almost surely, 2^76605921 is an apocalyptic number.

It is an amenable number.

76605921 is a deficient number, since it is larger than the sum of its proper divisors (50091039).

76605921 is a wasteful number, since it uses less digits than its factorization.

76605921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2282 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 76605921 is about 8752.4808483081. The cubic root of 76605921 is about 424.7050705825.

The spelling of 76605921 in words is "seventy-six million, six hundred five thousand, nine hundred twenty-one".