1662871656 has 32 divisors (see below), whose sum is σ = 4245632640. Its totient is φ = 542496768.

The previous prime is 1662871631. The next prime is 1662871667. The reversal of 1662871656 is 6561782661.

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, 735961 + ... + 738216.

It is an arithmetic number, because the mean of its divisors is an integer number (132676020).

Almost surely, 2^1662871656 is an apocalyptic number.

It is an amenable number.

1662871656 is an abundant number, since it is smaller than the sum of its proper divisors (2582760984).

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

1662871656 is a wasteful number, since it uses less digits than its factorization.

1662871656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474233 (or 1474229 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 1662871656 is about 40778.3233593536. The cubic root of 1662871656 is about 1184.7305210726.

The spelling of 1662871656 in words is "one billion, six hundred sixty-two million, eight hundred seventy-one thousand, six hundred fifty-six".