2206665615557 has 8 divisors (see below), whose sum is σ = 2376420662784. Its totient is φ = 2036912216688.

The previous prime is 2206665615541. The next prime is 2206665615569. The reversal of 2206665615557 is 7555165666022.

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 2206665615557 - 2⁴ = 2206665615541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2206665615587) 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, 5038988 + ... + 5459370.

It is an arithmetic number, because the mean of its divisors is an integer number (297052582848).

Almost surely, 2^{2206665615557} is an apocalyptic number.

It is an amenable number.

2206665615557 is a deficient number, since it is larger than the sum of its proper divisors (169755047227).

2206665615557 is a wasteful number, since it uses less digits than its factorization.

2206665615557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824179.

The product of its (nonzero) digits is 22680000, while the sum is 56.

The spelling of 2206665615557 in words is "two trillion, two hundred six billion, six hundred sixty-five million, six hundred fifteen thousand, five hundred fifty-seven".