15666241461 has 8 divisors (see below), whose sum is σ = 22495116000. Its totient is φ = 9640763952.

The previous prime is 15666241453. The next prime is 15666241477. The reversal of 15666241461 is 16414266651.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15666241461 - 2³ = 15666241453 is a prime.

It is a super-2 number, since 2×15666241461² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15666241411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200849211 + ... + 200849288.

It is an arithmetic number, because the mean of its divisors is an integer number (2811889500).

Almost surely, 2^15666241461 is an apocalyptic number.

It is an amenable number.

15666241461 is a deficient number, since it is larger than the sum of its proper divisors (6828874539).

15666241461 is a wasteful number, since it uses less digits than its factorization.

15666241461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401698515.

The product of its digits is 207360, while the sum is 42.

The spelling of 15666241461 in words is "fifteen billion, six hundred sixty-six million, two hundred forty-one thousand, four hundred sixty-one".