1966740993 has 20 divisors (see below), whose sum is σ = 3357682240. Its totient is φ = 1123851672.

The previous prime is 1966740973. The next prime is 1966741039. The reversal of 1966740993 is 3990476691.

1966740993 is a `hidden beast` number, since 1 + 96 + 67 + 409 + 93 = 666.

It is not a de Polignac number, because 1966740993 - 2⁶ = 1966740929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1966740913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1733773 + ... + 1734906.

It is an arithmetic number, because the mean of its divisors is an integer number (167884112).

Almost surely, 2^1966740993 is an apocalyptic number.

It is an amenable number.

1966740993 is a deficient number, since it is larger than the sum of its proper divisors (1390941247).

1966740993 is an equidigital number, since it uses as much as digits as its factorization.

1966740993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468698 (or 3468689 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 1966740993 is about 44347.9536506477. The cubic root of 1966740993 is about 1252.8980211597.

The spelling of 1966740993 in words is "one billion, nine hundred sixty-six million, seven hundred forty thousand, nine hundred ninety-three".