1966766141 has 4 divisors (see below), whose sum is σ = 1967754972. Its totient is φ = 1965777312.

The previous prime is 1966766119. The next prime is 1966766149. The reversal of 1966766141 is 1416676691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1416676691 = 17 ⋅83333923.

It can be written as a sum of positive squares in 2 ways, for example, as 1676574916 + 290191225 = 40946^2 + 17035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966766141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966766149) 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, 491426 + ... + 495411.

It is an arithmetic number, because the mean of its divisors is an integer number (491938743).

Almost surely, 2^1966766141 is an apocalyptic number.

It is an amenable number.

1966766141 is a deficient number, since it is larger than the sum of its proper divisors (988831).

1966766141 is an equidigital number, since it uses as much as digits as its factorization.

1966766141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988830.

The product of its digits is 326592, while the sum is 47.

The square root of 1966766141 is about 44348.2371802984. The cubic root of 1966766141 is about 1252.9033612536.

The spelling of 1966766141 in words is "one billion, nine hundred sixty-six million, seven hundred sixty-six thousand, one hundred forty-one".