1666611662 has 8 divisors (see below), whose sum is σ = 2500094856. Its totient is φ = 833246712.

The previous prime is 1666611647. The next prime is 1666611679. The reversal of 1666611662 is 2661166661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28433 + ... + 64355.

It is an arithmetic number, because the mean of its divisors is an integer number (312511857).

Almost surely, 2^1666611662 is an apocalyptic number.

1666611662 is a deficient number, since it is larger than the sum of its proper divisors (833483194).

1666611662 is a wasteful number, since it uses less digits than its factorization.

1666611662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59122.

The product of its digits is 93312, while the sum is 41.

The square root of 1666611662 is about 40824.1553739940. The cubic root of 1666611662 is about 1185.6180583045.

The spelling of 1666611662 in words is "one billion, six hundred sixty-six million, six hundred eleven thousand, six hundred sixty-two".