151820663 has 4 divisors (see below), whose sum is σ = 155523648. Its totient is φ = 148117680.

The previous prime is 151820651. The next prime is 151820681. The reversal of 151820663 is 366028151.

It is a happy number.

151820663 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: 366028151 = 47 ⋅7787833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151820663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151820623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851431 + ... + 1851512.

It is an arithmetic number, because the mean of its divisors is an integer number (38880912).

Almost surely, 2^151820663 is an apocalyptic number.

151820663 is a deficient number, since it is larger than the sum of its proper divisors (3702985).

151820663 is an equidigital number, since it uses as much as digits as its factorization.

151820663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702984.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 151820663 is about 12321.5527836389. The cubic root of 151820663 is about 533.4703598002.

The spelling of 151820663 in words is "one hundred fifty-one million, eight hundred twenty thousand, six hundred sixty-three".