1661006151 has 12 divisors (see below), whose sum is σ = 2741978512. Its totient is φ = 949146336.

The previous prime is 1661006143. The next prime is 1661006213. The reversal of 1661006151 is 1516001661.

It is not a de Polignac number, because 1661006151 - 2³ = 1661006143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661006101) 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 11 ways as a sum of consecutive naturals, for example, 13182526 + ... + 13182651.

Almost surely, 2^1661006151 is an apocalyptic number.

1661006151 is a deficient number, since it is larger than the sum of its proper divisors (1080972361).

1661006151 is a wasteful number, since it uses less digits than its factorization.

1661006151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26365190 (or 26365187 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1661006151 is about 40755.4432070122. The cubic root of 1661006151 is about 1184.2873223650.

The spelling of 1661006151 in words is "one billion, six hundred sixty-one million, six thousand, one hundred fifty-one".