1666922475 has 24 divisors (see below), whose sum is σ = 2757222832. Its totient is φ = 888624000.

The previous prime is 1666922461. The next prime is 1666922479. The reversal of 1666922475 is 5742296661.

It is not a de Polignac number, because 1666922475 - 2²⁵ = 1633368043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666922479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244209 + ... + 250941.

Almost surely, 2^1666922475 is an apocalyptic number.

1666922475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1666922475 is a deficient number, since it is larger than the sum of its proper divisors (1090300357).

1666922475 is a wasteful number, since it uses less digits than its factorization.

1666922475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10047 (or 10042 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 1666922475 is about 40827.9619256215. The cubic root of 1666922475 is about 1185.6917572567.

The spelling of 1666922475 in words is "one billion, six hundred sixty-six million, nine hundred twenty-two thousand, four hundred seventy-five".