1666614417 has 24 divisors (see below), whose sum is σ = 2406148416. Its totient is φ = 1020039168.

The previous prime is 1666614413. The next prime is 1666614457. The reversal of 1666614417 is 7144166661.

It is not a de Polignac number, because 1666614417 - 2² = 1666614413 is a prime.

It is a super-2 number, since 2×1666614417² = 5555207229904499778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666614413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2575588 + ... + 2576234.

It is an arithmetic number, because the mean of its divisors is an integer number (100256184).

Almost surely, 2^1666614417 is an apocalyptic number.

It is an amenable number.

1666614417 is a deficient number, since it is larger than the sum of its proper divisors (739533999).

1666614417 is an equidigital number, since it uses as much as digits as its factorization.

1666614417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177 (or 920 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 1666614417 is about 40824.1891162580. The cubic root of 1666614417 is about 1185.6187116012.

It can be divided in two parts, 166661 and 4417, that multiplied together give a palindrome (736141637).

The spelling of 1666614417 in words is "one billion, six hundred sixty-six million, six hundred fourteen thousand, four hundred seventeen".