1601651166 has 24 divisors (see below), whose sum is σ = 3242445000. Its totient is φ = 527437776.

The previous prime is 1601651131. The next prime is 1601651167. The reversal of 1601651166 is 6611561061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601651167) 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, 21960 + ... + 60708.

It is an arithmetic number, because the mean of its divisors is an integer number (135101875).

Almost surely, 2^1601651166 is an apocalyptic number.

1601651166 is an abundant number, since it is smaller than the sum of its proper divisors (1640793834).

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

1601651166 is an equidigital number, since it uses as much as digits as its factorization.

1601651166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38920 (or 38837 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1601651166 is about 40020.6342528451. The cubic root of 1601651166 is about 1170.0092935196.

The spelling of 1601651166 in words is "one billion, six hundred one million, six hundred fifty-one thousand, one hundred sixty-six".