1666011670 has 16 divisors (see below), whose sum is σ = 3129204960. Its totient is φ = 637430464.

The previous prime is 1666011643. The next prime is 1666011689. The reversal of 1666011670 is 761106661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3621535 + ... + 3621994.

It is an arithmetic number, because the mean of its divisors is an integer number (195575310).

Almost surely, 2^1666011670 is an apocalyptic number.

1666011670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666011670 is a deficient number, since it is larger than the sum of its proper divisors (1463193290).

1666011670 is a wasteful number, since it uses less digits than its factorization.

1666011670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243559.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1666011670 is about 40816.8062199874. The cubic root of 1666011670 is about 1185.4757642620.

It can be divided in two parts, 1666011 and 670, that added together give a square (1666681 = 1291²).

The spelling of 1666011670 in words is "one billion, six hundred sixty-six million, eleven thousand, six hundred seventy".