6556665151515 has 32 divisors (see below), whose sum is σ = 10505404042560. Its totient is φ = 3491976144384.

The previous prime is 6556665151513. The next prime is 6556665151573. The reversal of 6556665151515 is 5151515666556.

It is not a de Polignac number, because 6556665151515 - 2¹ = 6556665151513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6556665151513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87341577 + ... + 87416613.

It is an arithmetic number, because the mean of its divisors is an integer number (328293876330).

Almost surely, 2^{6556665151515} is an apocalyptic number.

6556665151515 is a deficient number, since it is larger than the sum of its proper divisors (3948738891045).

6556665151515 is a wasteful number, since it uses less digits than its factorization.

6556665151515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83151.

The product of its digits is 20250000, while the sum is 57.

The spelling of 6556665151515 in words is "six trillion, five hundred fifty-six billion, six hundred sixty-five million, one hundred fifty-one thousand, five hundred fifteen".