151616661 has 8 divisors (see below), whose sum is σ = 231034944. Its totient is φ = 86638080.

The previous prime is 151616657. The next prime is 151616671. The reversal of 151616661 is 166616151.

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

It is not a de Polignac number, because 151616661 - 2² = 151616657 is a prime.

It is a super-2 number, since 2×151616661² = 45975223785577842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151616651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3609900 + ... + 3609941.

It is an arithmetic number, because the mean of its divisors is an integer number (28879368).

Almost surely, 2^151616661 is an apocalyptic number.

It is an amenable number.

151616661 is a deficient number, since it is larger than the sum of its proper divisors (79418283).

151616661 is an equidigital number, since it uses as much as digits as its factorization.

151616661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7219851.

The product of its digits is 6480, while the sum is 33.

The square root of 151616661 is about 12313.2717423112. The cubic root of 151616661 is about 533.2313106500.

The spelling of 151616661 in words is "one hundred fifty-one million, six hundred sixteen thousand, six hundred sixty-one".