124566665421 has 96 divisors (see below), whose sum is σ = 191910766464. Its totient is φ = 71207424000.

The previous prime is 124566665417. The next prime is 124566665497.

It is a happy number.

124566665421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 124566665421 - 2² = 124566665417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124566665411) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 909245665 + ... + 909245801.

It is an arithmetic number, because the mean of its divisors is an integer number (1999070484).

Almost surely, 2^124566665421 is an apocalyptic number.

124566665421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124566665421 is a deficient number, since it is larger than the sum of its proper divisors (67344101043).

124566665421 is a wasteful number, since it uses less digits than its factorization.

124566665421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 362 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 48.

It can be divided in two parts, 124566 and 665421, that added together give a palindrome (789987).

The spelling of 124566665421 in words is "one hundred twenty-four billion, five hundred sixty-six million, six hundred sixty-five thousand, four hundred twenty-one".