1656166080 has 56 divisors (see below), whose sum is σ = 5258330352. Its totient is φ = 441644032.

The previous prime is 1656166073. The next prime is 1656166117. The reversal of 1656166080 is 806616561.

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, 861627 + ... + 863546.

Almost surely, 2^1656166080 is an apocalyptic number.

1656166080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656166080 is an abundant number, since it is smaller than the sum of its proper divisors (3602164272).

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

1656166080 is a wasteful number, since it uses less digits than its factorization.

1656166080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725193 (or 1725183 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1656166080 is about 40696.0204442646. The cubic root of 1656166080 is about 1183.1358894715.

The spelling of 1656166080 in words is "one billion, six hundred fifty-six million, one hundred sixty-six thousand, eighty".