7900661 has 8 divisors (see below), whose sum is σ = 8273664. Its totient is φ = 7530160.

The previous prime is 7900609. The next prime is 7900663. The reversal of 7900661 is 1660097.

It is a happy number.

7900661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7900661 - 2¹⁸ = 7638517 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 (7900663) 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, 9515 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (1034208).

Almost surely, 2^7900661 is an apocalyptic number.

It is an amenable number.

7900661 is a deficient number, since it is larger than the sum of its proper divisors (373003).

7900661 is a wasteful number, since it uses less digits than its factorization.

7900661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 7900661 is about 2810.8114486746. The cubic root of 7900661 is about 199.1687246937.

The spelling of 7900661 in words is "seven million, nine hundred thousand, six hundred sixty-one".