151666820 has 12 divisors (see below), whose sum is σ = 318500364. Its totient is φ = 60666720.

The previous prime is 151666819. The next prime is 151666861. The reversal of 151666820 is 28666151.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 88209664 + 63457156 = 9392^2 + 7966^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3791651 + ... + 3791690.

It is an arithmetic number, because the mean of its divisors is an integer number (26541697).

Almost surely, 2^151666820 is an apocalyptic number.

151666820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151666820 is an abundant number, since it is smaller than the sum of its proper divisors (166833544).

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

151666820 is a wasteful number, since it uses less digits than its factorization.

151666820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7583350 (or 7583348 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 151666820 is about 12315.3083599234. The cubic root of 151666820 is about 533.2901067396.

The spelling of 151666820 in words is "one hundred fifty-one million, six hundred sixty-six thousand, eight hundred twenty".