1966973810 has 8 divisors (see below), whose sum is σ = 3540552876. Its totient is φ = 786789520.

The previous prime is 1966973791. The next prime is 1966973821. The reversal of 1966973810 is 183796691.

It can be written as a sum of positive squares in 2 ways, for example, as 1754018161 + 212955649 = 41881^2 + 14593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1966973810² = 7737971938451832200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98348681 + ... + 98348700.

Almost surely, 2^1966973810 is an apocalyptic number.

1966973810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1966973810 is a deficient number, since it is larger than the sum of its proper divisors (1573579066).

1966973810 is a wasteful number, since it uses less digits than its factorization.

1966973810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196697388.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 1966973810 is about 44350.5784629693. The cubic root of 1966973810 is about 1252.9474573336.

The spelling of 1966973810 in words is "one billion, nine hundred sixty-six million, nine hundred seventy-three thousand, eight hundred ten".