1966513906 has 16 divisors (see below), whose sum is σ = 3376425024. Its totient is φ = 841477104.

The previous prime is 1966513853. The next prime is 1966513907. The reversal of 1966513906 is 6093156691.

It is not an unprimeable number, because it can be changed into a prime (1966513907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100225 + ... + 118228.

It is an arithmetic number, because the mean of its divisors is an integer number (211026564).

Almost surely, 2^1966513906 is an apocalyptic number.

1966513906 is a deficient number, since it is larger than the sum of its proper divisors (1409911118).

1966513906 is a wasteful number, since it uses less digits than its factorization.

1966513906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219105.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 1966513906 is about 44345.3932894951. The cubic root of 1966513906 is about 1252.8497979306.

The spelling of 1966513906 in words is "one billion, nine hundred sixty-six million, five hundred thirteen thousand, nine hundred six".