1666426301 has 4 divisors (see below), whose sum is σ = 1669127772. Its totient is φ = 1663724832.

The previous prime is 1666426277. The next prime is 1666426319. The reversal of 1666426301 is 1036246661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65626201 + 1600800100 = 8101^2 + 40010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666426301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666426351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349810 + ... + 1351043.

It is an arithmetic number, because the mean of its divisors is an integer number (417281943).

Almost surely, 2^1666426301 is an apocalyptic number.

It is an amenable number.

1666426301 is a deficient number, since it is larger than the sum of its proper divisors (2701471).

1666426301 is an equidigital number, since it uses as much as digits as its factorization.

1666426301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701470.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 1666426301 is about 40821.8850740629. The cubic root of 1666426301 is about 1185.5741017544.

The spelling of 1666426301 in words is "one billion, six hundred sixty-six million, four hundred twenty-six thousand, three hundred one".