1003166663721 has 32 divisors (see below), whose sum is σ = 1464310118400. Its totient is φ = 608651858880.

The previous prime is 1003166663693. The next prime is 1003166663783. The reversal of 1003166663721 is 1273666613001.

It is not a de Polignac number, because 1003166663721 - 2¹⁴ = 1003166647337 is a prime.

It is a super-2 number, since 2×1003166663721² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1003166663321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2843895 + ... + 3177116.

It is an arithmetic number, because the mean of its divisors is an integer number (45759691200).

Almost surely, 2^{1003166663721} is an apocalyptic number.

It is an amenable number.

1003166663721 is a deficient number, since it is larger than the sum of its proper divisors (461143454679).

1003166663721 is a wasteful number, since it uses less digits than its factorization.

1003166663721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6021149.

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 1003166663721 in words is "one trillion, three billion, one hundred sixty-six million, six hundred sixty-three thousand, seven hundred twenty-one".