55078661 has 8 divisors (see below), whose sum is σ = 62024448. Its totient is φ = 48456000.

The previous prime is 55078651. The next prime is 55078679. The reversal of 55078661 is 16687055.

It is a happy number.

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 55078661 - 2¹⁴ = 55062277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55078601) 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, 80420 + ... + 81101.

It is an arithmetic number, because the mean of its divisors is an integer number (7753056).

Almost surely, 2^55078661 is an apocalyptic number.

It is an amenable number.

55078661 is a deficient number, since it is larger than the sum of its proper divisors (6945787).

55078661 is a wasteful number, since it uses less digits than its factorization.

55078661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161563.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 55078661 is about 7421.4999157852. The cubic root of 55078661 is about 380.4764591336.

The spelling of 55078661 in words is "fifty-five million, seventy-eight thousand, six hundred sixty-one".