1466521721025 has 24 divisors (see below), whose sum is σ = 2424690759264. Its totient is φ = 782131526400.

The previous prime is 1466521720987. The next prime is 1466521721053. The reversal of 1466521721025 is 5201271256641.

It is not a de Polignac number, because 1466521721025 - 2²⁸ = 1466253285569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5523570 + ... + 5782980.

It is an arithmetic number, because the mean of its divisors is an integer number (101028781636).

Almost surely, 2^{1466521721025} is an apocalyptic number.

1466521721025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1466521721025 is a deficient number, since it is larger than the sum of its proper divisors (958169038239).

1466521721025 is a wasteful number, since it uses less digits than its factorization.

1466521721025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334801 (or 334796 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

Adding to 1466521721025 its reverse (5201271256641), we get a palindrome (6667792977666).

The spelling of 1466521721025 in words is "one trillion, four hundred sixty-six billion, five hundred twenty-one million, seven hundred twenty-one thousand, twenty-five".