1666774433 has 8 divisors (see below), whose sum is σ = 1671331200. Its totient is φ = 1662225408.

The previous prime is 1666774429. The next prime is 1666774463. The reversal of 1666774433 is 3344776661.

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 1666774433 - 2² = 1666774429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666774423) 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, 816428 + ... + 818466.

It is an arithmetic number, because the mean of its divisors is an integer number (208916400).

Almost surely, 2^1666774433 is an apocalyptic number.

It is an amenable number.

1666774433 is a deficient number, since it is larger than the sum of its proper divisors (4556767).

1666774433 is a wasteful number, since it uses less digits than its factorization.

1666774433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871.

The product of its digits is 1524096, while the sum is 47.

The square root of 1666774433 is about 40826.1488876921. The cubic root of 1666774433 is about 1185.6566551692.

The spelling of 1666774433 in words is "one billion, six hundred sixty-six million, seven hundred seventy-four thousand, four hundred thirty-three".