1656620166 has 32 divisors (see below), whose sum is σ = 3427688160. Its totient is φ = 533350656.

The previous prime is 1656620153. The next prime is 1656620177. The reversal of 1656620166 is 6610266561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3180 + ... + 57648.

It is an arithmetic number, because the mean of its divisors is an integer number (107115255).

Almost surely, 2^1656620166 is an apocalyptic number.

1656620166 is an abundant number, since it is smaller than the sum of its proper divisors (1771067994).

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

1656620166 is a wasteful number, since it uses less digits than its factorization.

1656620166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54648.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1656620166 is about 40701.5990594964. The cubic root of 1656620166 is about 1183.2440099386.

The spelling of 1656620166 in words is "one billion, six hundred fifty-six million, six hundred twenty thousand, one hundred sixty-six".