1466965021 has 4 divisors (see below), whose sum is σ = 1468265500. Its totient is φ = 1465664544.

The previous prime is 1466965013. The next prime is 1466965057. The reversal of 1466965021 is 1205696641.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1205696641 = 2083 ⋅578827.

It can be written as a sum of positive squares in 2 ways, for example, as 442260900 + 1024704121 = 21030^2 + 32011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1466965021 - 2³ = 1466965013 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 (1466945021) 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, 648546 + ... + 650803.

It is an arithmetic number, because the mean of its divisors is an integer number (367066375).

Almost surely, 2^1466965021 is an apocalyptic number.

It is an amenable number.

1466965021 is a deficient number, since it is larger than the sum of its proper divisors (1300479).

1466965021 is a wasteful number, since it uses less digits than its factorization.

1466965021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300478.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 1466965021 is about 38300.9793739011. The cubic root of 1466965021 is about 1136.2483166275.

The spelling of 1466965021 in words is "one billion, four hundred sixty-six million, nine hundred sixty-five thousand, twenty-one".