1321666130 has 16 divisors (see below), whose sum is σ = 2402097984. Its totient is φ = 523533360.

The previous prime is 1321666117. The next prime is 1321666153. The reversal of 1321666130 is 316661231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1321666093 and 1321666102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640556 + ... + 642615.

It is an arithmetic number, because the mean of its divisors is an integer number (150131124).

Almost surely, 2^1321666130 is an apocalyptic number.

1321666130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321666130 is a deficient number, since it is larger than the sum of its proper divisors (1080431854).

1321666130 is a wasteful number, since it uses less digits than its factorization.

1321666130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283281.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1321666130 is about 36354.7263777353. The cubic root of 1321666130 is about 1097.4226518272.

The spelling of 1321666130 in words is "one billion, three hundred twenty-one million, six hundred sixty-six thousand, one hundred thirty".