1966672554 has 64 divisors (see below), whose sum is σ = 4914542592. Its totient is φ = 509716800.

The previous prime is 1966672541. The next prime is 1966672571. The reversal of 1966672554 is 4552766691.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1966672497 and 1966672506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220624 + ... + 229364.

It is an arithmetic number, because the mean of its divisors is an integer number (76789728).

Almost surely, 2^1966672554 is an apocalyptic number.

1966672554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1966672554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2457271296).

1966672554 is an abundant number, since it is smaller than the sum of its proper divisors (2947870038).

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

1966672554 is a wasteful number, since it uses less digits than its factorization.

1966672554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9251.

The product of its digits is 2721600, while the sum is 51.

The square root of 1966672554 is about 44347.1820299780. The cubic root of 1966672554 is about 1252.8834881357.

The spelling of 1966672554 in words is "one billion, nine hundred sixty-six million, six hundred seventy-two thousand, five hundred fifty-four".