1406645665220 has 96 divisors (see below), whose sum is σ = 3398539576320. Its totient is φ = 485505515520.

The previous prime is 1406645665199. The next prime is 1406645665241. The reversal of 1406645665220 is 225665466041.

It is an interprime number because it is at equal distance from previous prime (1406645665199) and next prime (1406645665241).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3311789 + ... + 3712308.

It is an arithmetic number, because the mean of its divisors is an integer number (35401453920).

Almost surely, 2^{1406645665220} is an apocalyptic number.

1406645665220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1406645665220 is an abundant number, since it is smaller than the sum of its proper divisors (1991893911100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1406645665220 is a wasteful number, since it uses less digits than its factorization.

1406645665220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7024173 (or 7024171 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 1406645665220 in words is "one trillion, four hundred six billion, six hundred forty-five million, six hundred sixty-five thousand, two hundred twenty".