1551386166 has 16 divisors (see below), whose sum is σ = 3384842688. Its totient is φ = 470117000.

The previous prime is 1551386149. The next prime is 1551386171. The reversal of 1551386166 is 6616831551.

It is a congruent number.

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, 11752860 + ... + 11752991.

It is an arithmetic number, because the mean of its divisors is an integer number (211552668).

Almost surely, 2^1551386166 is an apocalyptic number.

1551386166 is an abundant number, since it is smaller than the sum of its proper divisors (1833456522).

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

1551386166 is a wasteful number, since it uses less digits than its factorization.

1551386166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23505867.

The product of its digits is 129600, while the sum is 42.

The square root of 1551386166 is about 39387.6397617324. The cubic root of 1551386166 is about 1157.6394142199.

The spelling of 1551386166 in words is "one billion, five hundred fifty-one million, three hundred eighty-six thousand, one hundred sixty-six".