1666651662 has 24 divisors (see below), whose sum is σ = 3888854424. Its totient is φ = 512815824.

The previous prime is 1666651619. The next prime is 1666651669. The reversal of 1666651662 is 2661566661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666651669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3560988 + ... + 3561455.

It is an arithmetic number, because the mean of its divisors is an integer number (162035601).

Almost surely, 2^1666651662 is an apocalyptic number.

1666651662 is an abundant number, since it is smaller than the sum of its proper divisors (2222202762).

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

1666651662 is a wasteful number, since it uses less digits than its factorization.

1666651662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122464 (or 7122461 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 1666651662 is about 40824.6452770872. The cubic root of 1666651662 is about 1185.6275434861.

The spelling of 1666651662 in words is "one billion, six hundred sixty-six million, six hundred fifty-one thousand, six hundred sixty-two".