1665612151 has 8 divisors (see below), whose sum is σ = 1903809024. Its totient is φ = 1427478360.

The previous prime is 1665612133. The next prime is 1665612163. The reversal of 1665612151 is 1512165661.

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

It is not a de Polignac number, because 1665612151 - 2¹⁷ = 1665481079 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 (1665612101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78006 + ... + 97036.

It is an arithmetic number, because the mean of its divisors is an integer number (237976128).

Almost surely, 2^1665612151 is an apocalyptic number.

1665612151 is a deficient number, since it is larger than the sum of its proper divisors (238196873).

1665612151 is a wasteful number, since it uses less digits than its factorization.

1665612151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31541.

The product of its digits is 10800, while the sum is 34.

The square root of 1665612151 is about 40811.9118763138. The cubic root of 1665612151 is about 1185.3809954268.

The spelling of 1665612151 in words is "one billion, six hundred sixty-five million, six hundred twelve thousand, one hundred fifty-one".