151866 has 48 divisors (see below), whose sum is σ = 393120. Its totient is φ = 41760.

The previous prime is 151849. The next prime is 151871. The reversal of 151866 is 668151.

It is an Ulam number.

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2545 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (8190).

2¹⁵¹⁸⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196560).

151866 is an abundant number, since it is smaller than the sum of its proper divisors (241254).

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

151866 is a wasteful number, since it uses less digits than its factorization.

151866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 88 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 151866 is about 389.6998845265. The cubic root of 151866 is about 53.3523456522.

Subtracting from 151866 its product of digits (1440), we obtain a triangular number (150426 = T₅₄₈).

It can be divided in two parts, 15 and 1866, that added together give a palindrome (1881).

The spelling of 151866 in words is "one hundred fifty-one thousand, eight hundred sixty-six".