1066991403 has 8 divisors (see below), whose sum is σ = 1471712400. Its totient is φ = 686799008.

The previous prime is 1066991381. The next prime is 1066991411. The reversal of 1066991403 is 3041996601.

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

It is a cyclic number.

It is not a de Polignac number, because 1066991403 - 2¹² = 1066987307 is a prime.

It is a super-2 number, since 2×1066991403² = 2276941308151816818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066991803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6132048 + ... + 6132221.

It is an arithmetic number, because the mean of its divisors is an integer number (183964050).

Almost surely, 2^1066991403 is an apocalyptic number.

1066991403 is a deficient number, since it is larger than the sum of its proper divisors (404720997).

1066991403 is a wasteful number, since it uses less digits than its factorization.

1066991403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12264301.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 1066991403 is about 32664.8343482712. The cubic root of 1066991403 is about 1021.8495862191.

The spelling of 1066991403 in words is "one billion, sixty-six million, nine hundred ninety-one thousand, four hundred three".