76561655 has 8 divisors (see below), whose sum is σ = 91921200. Its totient is φ = 61217856.

The previous prime is 76561633. The next prime is 76561657. The reversal of 76561655 is 55616567.

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 76561655 - 2²⁰ = 75513079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76561657) 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, 15476 + ... + 19814.

It is an arithmetic number, because the mean of its divisors is an integer number (11490150).

Almost surely, 2^76561655 is an apocalyptic number.

76561655 is a deficient number, since it is larger than the sum of its proper divisors (15359545).

76561655 is a wasteful number, since it uses less digits than its factorization.

76561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873.

The product of its digits is 189000, while the sum is 41.

The square root of 76561655 is about 8749.9517141525. The cubic root of 76561655 is about 424.6232508976.

The spelling of 76561655 in words is "seventy-six million, five hundred sixty-one thousand, six hundred fifty-five".