2661901 has 8 divisors (see below), whose sum is σ = 2937600. Its totient is φ = 2391840.

The previous prime is 2661899. The next prime is 2661917. The reversal of 2661901 is 1091662.

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

It is not a de Polignac number, because 2661901 - 2¹ = 2661899 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 (2661931) 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, 381 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (367200).

2^2661901 is an apocalyptic number.

It is an amenable number.

2661901 is a deficient number, since it is larger than the sum of its proper divisors (275699).

2661901 is a wasteful number, since it uses less digits than its factorization.

2661901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2661901 is about 1631.5333278852. The cubic root of 2661901 is about 138.5895973930.

The spelling of 2661901 in words is "two million, six hundred sixty-one thousand, nine hundred one".