1466853721 has 8 divisors (see below), whose sum is σ = 1555073640. Its totient is φ = 1378848768.

The previous prime is 1466853709. The next prime is 1466853733. The reversal of 1466853721 is 1273586641.

It is an interprime number because it is at equal distance from previous prime (1466853709) and next prime (1466853733).

It can be written as a sum of positive squares in 4 ways, for example, as 1069290000 + 397563721 = 32700^2 + 19939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1466853721 - 2⁹ = 1466853209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1466853701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39576 + ... + 67081.

It is an arithmetic number, because the mean of its divisors is an integer number (194384205).

Almost surely, 2^1466853721 is an apocalyptic number.

It is an amenable number.

1466853721 is a deficient number, since it is larger than the sum of its proper divisors (88219919).

1466853721 is a wasteful number, since it uses less digits than its factorization.

1466853721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107483.

The product of its digits is 241920, while the sum is 43.

The square root of 1466853721 is about 38299.5263808836. The cubic root of 1466853721 is about 1136.2195798287.

The spelling of 1466853721 in words is "one billion, four hundred sixty-six million, eight hundred fifty-three thousand, seven hundred twenty-one".