554678661 has 4 divisors (see below), whose sum is σ = 739571552. Its totient is φ = 369785772.

The previous prime is 554678651. The next prime is 554678711. The reversal of 554678661 is 166876455.

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 554678661 - 2⁹ = 554678149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 554678661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554678651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92446441 + ... + 92446446.

It is an arithmetic number, because the mean of its divisors is an integer number (184892888).

Almost surely, 2^554678661 is an apocalyptic number.

It is an amenable number.

554678661 is a deficient number, since it is larger than the sum of its proper divisors (184892891).

554678661 is a wasteful number, since it uses less digits than its factorization.

554678661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184892890.

The product of its digits is 1209600, while the sum is 48.

The square root of 554678661 is about 23551.6169508592. The cubic root of 554678661 is about 821.6379420901.

The spelling of 554678661 in words is "five hundred fifty-four million, six hundred seventy-eight thousand, six hundred sixty-one".