1666711674 has 32 divisors (see below), whose sum is σ = 3705387840. Its totient is φ = 555332976.

The previous prime is 1666711663. The next prime is 1666711679. The reversal of 1666711674 is 4761176661.

It is not an unprimeable number, because it can be changed into a prime (1666711679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158917 + ... + 169079.

It is an arithmetic number, because the mean of its divisors is an integer number (115793370).

Almost surely, 2^1666711674 is an apocalyptic number.

1666711674 is an abundant number, since it is smaller than the sum of its proper divisors (2038676166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666711674 is a wasteful number, since it uses less digits than its factorization.

1666711674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13211 (or 13205 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 1666711674 is about 40825.3802676717. The cubic root of 1666711674 is about 1185.6417738195.

The spelling of 1666711674 in words is "one billion, six hundred sixty-six million, seven hundred eleven thousand, six hundred seventy-four".