1966006775 has 6 divisors (see below), whose sum is σ = 2437848432. Its totient is φ = 1572805400.

The previous prime is 1966006771. The next prime is 1966006781. The reversal of 1966006775 is 5776006691.

It is a happy number.

It is not a de Polignac number, because 1966006775 - 2² = 1966006771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966006771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39320111 + ... + 39320160.

It is an arithmetic number, because the mean of its divisors is an integer number (406308072).

Almost surely, 2^1966006775 is an apocalyptic number.

1966006775 is a deficient number, since it is larger than the sum of its proper divisors (471841657).

1966006775 is an equidigital number, since it uses as much as digits as its factorization.

1966006775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78640281 (or 78640276 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 1966006775 is about 44339.6749537026. The cubic root of 1966006775 is about 1252.7420923452.

The spelling of 1966006775 in words is "one billion, nine hundred sixty-six million, six thousand, seven hundred seventy-five".