1666160553 has 8 divisors (see below), whose sum is σ = 2221776448. Its totient is φ = 1110659184.

The previous prime is 1666160543. The next prime is 1666160581. The reversal of 1666160553 is 3550616661.

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

It is not a de Polignac number, because 1666160553 - 2¹⁷ = 1666029481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666160513) 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, 14676 + ... + 59562.

It is an arithmetic number, because the mean of its divisors is an integer number (277722056).

Almost surely, 2^1666160553 is an apocalyptic number.

It is an amenable number.

1666160553 is a deficient number, since it is larger than the sum of its proper divisors (555615895).

1666160553 is a wasteful number, since it uses less digits than its factorization.

1666160553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57263.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 1666160553 is about 40818.6299745594. The cubic root of 1666160553 is about 1185.5110765258.

The spelling of 1666160553 in words is "one billion, six hundred sixty-six million, one hundred sixty thousand, five hundred fifty-three".