1466427821 has 2 divisors, whose sum is σ = 1466427822. Its totient is φ = 1466427820.

The previous prime is 1466427817. The next prime is 1466427841. The reversal of 1466427821 is 1287246641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1411504900 + 54922921 = 37570^2 + 7411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1466427821 - 2² = 1466427817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1466427811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 733213910 + 733213911.

It is an arithmetic number, because the mean of its divisors is an integer number (733213911).

Almost surely, 2^1466427821 is an apocalyptic number.

It is an amenable number.

1466427821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1466427821 is an equidigital number, since it uses as much as digits as its factorization.

1466427821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 1466427821 is about 38293.9658562547. The cubic root of 1466427821 is about 1136.1096023182.

The spelling of 1466427821 in words is "one billion, four hundred sixty-six million, four hundred twenty-seven thousand, eight hundred twenty-one".