1966005739 has 4 divisors (see below), whose sum is σ = 1966103824. Its totient is φ = 1965907656.

The previous prime is 1966005737. The next prime is 1966005761. The reversal of 1966005739 is 9375006691.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1966005739 - 2¹ = 1966005737 is a prime.

It is a super-2 number, since 2×1966005739² = 7730357131561872242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1966005731) 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, 6912 + ... + 63085.

It is an arithmetic number, because the mean of its divisors is an integer number (491525956).

Almost surely, 2^1966005739 is an apocalyptic number.

1966005739 is a deficient number, since it is larger than the sum of its proper divisors (98085).

1966005739 is an equidigital number, since it uses as much as digits as its factorization.

1966005739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98084.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 1966005739 is about 44339.6632711616. The cubic root of 1966005739 is about 1252.7418722983.

The spelling of 1966005739 in words is "one billion, nine hundred sixty-six million, five thousand, seven hundred thirty-nine".