7849661 has 8 divisors (see below), whose sum is σ = 8098104. Its totient is φ = 7603200.

The previous prime is 7849657. The next prime is 7849729. The reversal of 7849661 is 1669487.

It can be written as a sum of positive squares in 4 ways, for example, as 3728761 + 4120900 = 1931^2 + 2030^2 .

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 7849661 - 2² = 7849657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7849561) 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, 12761 + ... + 13361.

It is an arithmetic number, because the mean of its divisors is an integer number (1012263).

Almost surely, 2^7849661 is an apocalyptic number.

It is an amenable number.

7849661 is a deficient number, since it is larger than the sum of its proper divisors (248443).

7849661 is a wasteful number, since it uses less digits than its factorization.

7849661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 72576, while the sum is 41.

The square root of 7849661 is about 2801.7246474270. The cubic root of 7849661 is about 198.7392441735.

The spelling of 7849661 in words is "seven million, eight hundred forty-nine thousand, six hundred sixty-one".