1651520166 has 16 divisors (see below), whose sum is σ = 3476884800. Its totient is φ = 521532648.

The previous prime is 1651520141. The next prime is 1651520177. The reversal of 1651520166 is 6610251561.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 7243396 + ... + 7243623.

It is an arithmetic number, because the mean of its divisors is an integer number (217305300).

Almost surely, 2^1651520166 is an apocalyptic number.

1651520166 is an abundant number, since it is smaller than the sum of its proper divisors (1825364634).

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

1651520166 is a wasteful number, since it uses less digits than its factorization.

1651520166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14487043.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1651520166 is about 40638.8996652222. The cubic root of 1651520166 is about 1182.0285336431.

The spelling of 1651520166 in words is "one billion, six hundred fifty-one million, five hundred twenty thousand, one hundred sixty-six".