1966709674 has 4 divisors (see below), whose sum is σ = 2950064514. Its totient is φ = 983354836.

The previous prime is 1966709671. The next prime is 1966709677. The reversal of 1966709674 is 4769076691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4769076691 = 17 ⋅280533923.

It is an interprime number because it is at equal distance from previous prime (1966709671) and next prime (1966709677).

It can be written as a sum of positive squares in only one way, i.e., 1839809449 + 126900225 = 42893^2 + 11265^2 .

It is not an unprimeable number, because it can be changed into a prime (1966709671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491677417 + ... + 491677420.

Almost surely, 2^1966709674 is an apocalyptic number.

1966709674 is a deficient number, since it is larger than the sum of its proper divisors (983354840).

1966709674 is an equidigital number, since it uses as much as digits as its factorization.

1966709674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983354839.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The square root of 1966709674 is about 44347.6005438851. The cubic root of 1966709674 is about 1252.8913706108.

The spelling of 1966709674 in words is "one billion, nine hundred sixty-six million, seven hundred nine thousand, six hundred seventy-four".