6661151523 has 48 divisors (see below), whose sum is σ = 10564837920. Its totient is φ = 4019507712.

The previous prime is 6661151513. The next prime is 6661151579. The reversal of 6661151523 is 3251511666.

It is not a de Polignac number, because 6661151523 - 2¹⁰ = 6661150499 is a prime.

It is a super-2 number, since 2×6661151523² = 88741879224730439058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6661151513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1526661 + ... + 1531017.

It is an arithmetic number, because the mean of its divisors is an integer number (220100790).

Almost surely, 2^6661151523 is an apocalyptic number.

6661151523 is a deficient number, since it is larger than the sum of its proper divisors (3903686397).

6661151523 is a wasteful number, since it uses less digits than its factorization.

6661151523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628 (or 4625 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 6661151523 is about 81615.8778853723. The cubic root of 6661151523 is about 1881.5529196902.

The spelling of 6661151523 in words is "six billion, six hundred sixty-one million, one hundred fifty-one thousand, five hundred twenty-three".