1651551166 has 16 divisors (see below), whose sum is σ = 2562868656. Its totient is φ = 797587776.

The previous prime is 1651551163. The next prime is 1651551199. The reversal of 1651551166 is 6611551561.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651551163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71316 + ... + 91591.

It is an arithmetic number, because the mean of its divisors is an integer number (160179291).

Almost surely, 2^1651551166 is an apocalyptic number.

1651551166 is a deficient number, since it is larger than the sum of its proper divisors (911317490).

1651551166 is a wasteful number, since it uses less digits than its factorization.

1651551166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163083.

The product of its digits is 27000, while the sum is 37.

The square root of 1651551166 is about 40639.2810713969. The cubic root of 1651551166 is about 1182.0359293860.

The spelling of 1651551166 in words is "one billion, six hundred fifty-one million, five hundred fifty-one thousand, one hundred sixty-six".