1301666699 has 4 divisors (see below), whose sum is σ = 1308938760. Its totient is φ = 1294394640.

The previous prime is 1301666677. The next prime is 1301666701. The reversal of 1301666699 is 9966661031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9966661031 = 16349 ⋅609619.

It is a cyclic number.

It is not a de Polignac number, because 1301666699 - 2¹⁶ = 1301601163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1301666609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3635762 + ... + 3636119.

It is an arithmetic number, because the mean of its divisors is an integer number (327234690).

Almost surely, 2^1301666699 is an apocalyptic number.

1301666699 is a deficient number, since it is larger than the sum of its proper divisors (7272061).

1301666699 is an equidigital number, since it uses as much as digits as its factorization.

1301666699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7272060.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 1301666699 is about 36078.6183078011. The cubic root of 1301666699 is about 1091.8591001392.

The spelling of 1301666699 in words is "one billion, three hundred one million, six hundred sixty-six thousand, six hundred ninety-nine".