661446151 has 8 divisors (see below), whose sum is σ = 680952704. Its totient is φ = 642025440.

The previous prime is 661446143. The next prime is 661446169. The reversal of 661446151 is 151644166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 661446151 - 2³ = 661446143 is a prime.

It is a super-2 number, since 2×661446151² = 875022021345429602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661446451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5655 + ... + 36808.

It is an arithmetic number, because the mean of its divisors is an integer number (85119088).

Almost surely, 2^661446151 is an apocalyptic number.

661446151 is a deficient number, since it is larger than the sum of its proper divisors (19506553).

661446151 is a wasteful number, since it uses less digits than its factorization.

661446151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42921.

The product of its digits is 17280, while the sum is 34.

The square root of 661446151 is about 25718.5954320993. The cubic root of 661446151 is about 871.2942163618.

The spelling of 661446151 in words is "six hundred sixty-one million, four hundred forty-six thousand, one hundred fifty-one".