151891066 has 4 divisors (see below), whose sum is σ = 227836602. Its totient is φ = 75945532.

The previous prime is 151891021. The next prime is 151891087. The reversal of 151891066 is 660198151.

151891066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660198151 = 727 ⋅908113.

It can be written as a sum of positive squares in only one way, i.e., 120362841 + 31528225 = 10971^2 + 5615^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37972765 + ... + 37972768.

Almost surely, 2^151891066 is an apocalyptic number.

151891066 is a deficient number, since it is larger than the sum of its proper divisors (75945536).

151891066 is an equidigital number, since it uses as much as digits as its factorization.

151891066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75945535.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 151891066 is about 12324.4093570443. The cubic root of 151891066 is about 533.5528081946.

The spelling of 151891066 in words is "one hundred fifty-one million, eight hundred ninety-one thousand, sixty-six".