76660509 has 8 divisors (see below), whose sum is σ = 102785760. Its totient is φ = 50821136.

The previous prime is 76660477. The next prime is 76660517. The reversal of 76660509 is 90506667.

It is a happy number.

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 76660509 - 2⁵ = 76660477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76660589) 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, 70842 + ... + 71915.

It is an arithmetic number, because the mean of its divisors is an integer number (12848220).

Almost surely, 2^76660509 is an apocalyptic number.

It is an amenable number.

76660509 is a deficient number, since it is larger than the sum of its proper divisors (26125251).

76660509 is a wasteful number, since it uses less digits than its factorization.

76660509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142939.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 76660509 is about 8755.5987231028. The cubic root of 76660509 is about 424.8059256925.

The spelling of 76660509 in words is "seventy-six million, six hundred sixty thousand, five hundred nine".