1966807770 has 32 divisors (see below), whose sum is σ = 4724991360. Its totient is φ = 523965120.

The previous prime is 1966807751. The next prime is 1966807807. The reversal of 1966807770 is 777086691.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865 + ... + 62724.

It is an arithmetic number, because the mean of its divisors is an integer number (147655980).

Almost surely, 2^1966807770 is an apocalyptic number.

1966807770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1966807770 is an abundant number, since it is smaller than the sum of its proper divisors (2758183590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1966807770 is a wasteful number, since it uses less digits than its factorization.

1966807770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64630.

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 1966807770 is about 44348.7065200328. The cubic root of 1966807770 is about 1252.9122009330.

The spelling of 1966807770 in words is "one billion, nine hundred sixty-six million, eight hundred seven thousand, seven hundred seventy".