1966091926276 has 27 divisors (see below), whose sum is σ = 3454491743157. Its totient is φ = 979110060720.

The previous prime is 1966091926247. The next prime is 1966091926277. The reversal of 1966091926276 is 6726291906691.

It is a happy number.

The square root of 1966091926276 is 1402174.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 338875336900 + 1627216589376 = 582130^2 + 1275624^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1966091926277) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 776803131 + ... + 776805661.

Almost surely, 2^{1966091926276} is an apocalyptic number.

1966091926276 is the 1402174-th square number.

It is an amenable number.

1966091926276 is a deficient number, since it is larger than the sum of its proper divisors (1488399816881).

1966091926276 is an frugal number, since it uses more digits than its factorization.

1966091926276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620 (or 2810 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 64.

Multiplying 1966091926276 by its sum of digits (64), we get a square (125829883281664 = 11217392²).

The spelling of 1966091926276 in words is "one trillion, nine hundred sixty-six billion, ninety-one million, nine hundred twenty-six thousand, two hundred seventy-six".