7550661 has 4 divisors (see below), whose sum is σ = 10067552. Its totient is φ = 5033772.

The previous prime is 7550629. The next prime is 7550677. The reversal of 7550661 is 1660557.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7550661 - 2⁵ = 7550629 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 (7550461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258441 + ... + 1258446.

It is an arithmetic number, because the mean of its divisors is an integer number (2516888).

Almost surely, 2^7550661 is an apocalyptic number.

It is an amenable number.

7550661 is a deficient number, since it is larger than the sum of its proper divisors (2516891).

7550661 is a wasteful number, since it uses less digits than its factorization.

7550661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516890.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 7550661 is about 2747.8466114396. The cubic root of 7550661 is about 196.1831292041.

The spelling of 7550661 in words is "seven million, five hundred fifty thousand, six hundred sixty-one".