2667151661 has 4 divisors (see below), whose sum is σ = 2667832032. Its totient is φ = 2666471292.

The previous prime is 2667151649. The next prime is 2667151687. The reversal of 2667151661 is 1661517662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2667151661 - 2¹⁴ = 2667135277 is a prime.

It is a super-2 number, since 2×2667151661² = 14227395965550117842, 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 (2667151601) 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 3 ways as a sum of consecutive naturals, for example, 334271 + ... + 342156.

It is an arithmetic number, because the mean of its divisors is an integer number (666958008).

Almost surely, 2^2667151661 is an apocalyptic number.

It is an amenable number.

2667151661 is a deficient number, since it is larger than the sum of its proper divisors (680371).

2667151661 is an equidigital number, since it uses as much as digits as its factorization.

2667151661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680370.

The product of its digits is 90720, while the sum is 41.

The square root of 2667151661 is about 51644.4736733757. The cubic root of 2667151661 is about 1386.8066126774.

The spelling of 2667151661 in words is "two billion, six hundred sixty-seven million, one hundred fifty-one thousand, six hundred sixty-one".