7623661 has 2 divisors, whose sum is σ = 7623662. Its totient is φ = 7623660.

The previous prime is 7623653. The next prime is 7623689. The reversal of 7623661 is 1663267.

7623661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7257636 + 366025 = 2694^2 + 605^2 .

It is an emirp because it is prime and its reverse (1663267) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7623661 - 2³ = 7623653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7623611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3811830 + 3811831.

It is an arithmetic number, because the mean of its divisors is an integer number (3811831).

Almost surely, 2^7623661 is an apocalyptic number.

It is an amenable number.

7623661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7623661 is an equidigital number, since it uses as much as digits as its factorization.

7623661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 7623661 is about 2761.0977889238. The cubic root of 7623661 is about 196.8133372353.

The spelling of 7623661 in words is "seven million, six hundred twenty-three thousand, six hundred sixty-one".