1966347994 has 8 divisors (see below), whose sum is σ = 3176408340. Its totient is φ = 907545216.

The previous prime is 1966347983. The next prime is 1966348001. The reversal of 1966347994 is 4997436691.

It can be written as a sum of positive squares in 2 ways, for example, as 1963641969 + 2706025 = 44313^2 + 1645^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37814359 + ... + 37814410.

Almost surely, 2^1966347994 is an apocalyptic number.

1966347994 is a deficient number, since it is larger than the sum of its proper divisors (1210060346).

1966347994 is a wasteful number, since it uses less digits than its factorization.

1966347994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75628784.

The product of its digits is 8817984, while the sum is 58.

The square root of 1966347994 is about 44343.5225709460. The cubic root of 1966347994 is about 1252.8145632172.

The spelling of 1966347994 in words is "one billion, nine hundred sixty-six million, three hundred forty-seven thousand, nine hundred ninety-four".