55580665 has 8 divisors (see below), whose sum is σ = 76224960. Its totient is φ = 38112432.

The previous prime is 55580663. The next prime is 55580671. The reversal of 55580665 is 56608555.

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 55580665 - 2¹ = 55580663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55580663) 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, 793975 + ... + 794044.

It is an arithmetic number, because the mean of its divisors is an integer number (9528120).

Almost surely, 2^55580665 is an apocalyptic number.

It is an amenable number.

55580665 is a deficient number, since it is larger than the sum of its proper divisors (20644295).

55580665 is a wasteful number, since it uses less digits than its factorization.

55580665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588031.

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 55580665 is about 7455.2441274582. The cubic root of 55580665 is about 381.6288918033.

The spelling of 55580665 in words is "fifty-five million, five hundred eighty thousand, six hundred sixty-five".