2951661 has 8 divisors (see below), whose sum is σ = 3944160. Its totient is φ = 1963472.

The previous prime is 2951657. The next prime is 2951687. The reversal of 2951661 is 1661592.

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 2951661 - 2² = 2951657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2951621) 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, 1231 + ... + 2723.

It is an arithmetic number, because the mean of its divisors is an integer number (493020).

2^2951661 is an apocalyptic number.

It is an amenable number.

2951661 is a deficient number, since it is larger than the sum of its proper divisors (992499).

2951661 is a wasteful number, since it uses less digits than its factorization.

2951661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155.

The product of its digits is 3240, while the sum is 30.

The square root of 2951661 is about 1718.0398714815. The cubic root of 2951661 is about 143.4461265880.

The spelling of 2951661 in words is "two million, nine hundred fifty-one thousand, six hundred sixty-one".