6615671660555 has 32 divisors (see below), whose sum is σ = 8425975864320. Its totient is φ = 4975679111040.

The previous prime is 6615671660531. The next prime is 6615671660561. The reversal of 6615671660555 is 5550661765166.

It is a happy number.

It is not a de Polignac number, because 6615671660555 - 2²⁸ = 6615403225099 is a prime.

It is a super-2 number, since 2×6615671660555² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a junction number, because it is equal to n+sod(n) for n = 6615671660494 and 6615671660503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36759569 + ... + 36939101.

It is an arithmetic number, because the mean of its divisors is an integer number (263311745760).

Almost surely, 2^{6615671660555} is an apocalyptic number.

6615671660555 is a deficient number, since it is larger than the sum of its proper divisors (1810304203765).

6615671660555 is a wasteful number, since it uses less digits than its factorization.

6615671660555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185051.

The product of its (nonzero) digits is 34020000, while the sum is 59.

The spelling of 6615671660555 in words is "six trillion, six hundred fifteen billion, six hundred seventy-one million, six hundred sixty thousand, five hundred fifty-five".