1661067151 has 8 divisors (see below), whose sum is σ = 1668975264. Its totient is φ = 1653173760.

The previous prime is 1661067143. The next prime is 1661067173. The reversal of 1661067151 is 1517601661.

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 1661067151 - 2³ = 1661067143 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 (1661067181) 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, 268671 + ... + 274783.

It is an arithmetic number, because the mean of its divisors is an integer number (208621908).

Almost surely, 2^1661067151 is an apocalyptic number.

1661067151 is a deficient number, since it is larger than the sum of its proper divisors (7908113).

1661067151 is an equidigital number, since it uses as much as digits as its factorization.

1661067151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7361.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 1661067151 is about 40756.1915664356. The cubic root of 1661067151 is about 1184.3018197310.

The spelling of 1661067151 in words is "one billion, six hundred sixty-one million, sixty-seven thousand, one hundred fifty-one".