1866797890339 has 4 divisors (see below), whose sum is σ = 1866802084840. Its totient is φ = 1866793695840.

The previous prime is 1866797890333. The next prime is 1866797890357. The reversal of 1866797890339 is 9330987976681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1866797890339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1866797890333) 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, 1338054 + ... + 2350315.

It is an arithmetic number, because the mean of its divisors is an integer number (466700521210).

Almost surely, 2^{1866797890339} is an apocalyptic number.

1866797890339 is a deficient number, since it is larger than the sum of its proper divisors (4194501).

1866797890339 is an equidigital number, since it uses as much as digits as its factorization.

1866797890339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194500.

The product of its (nonzero) digits is 740710656, while the sum is 76.

The spelling of 1866797890339 in words is "one trillion, eight hundred sixty-six billion, seven hundred ninety-seven million, eight hundred ninety thousand, three hundred thirty-nine".