54665647 has 4 divisors (see below), whose sum is σ = 54728440. Its totient is φ = 54602856.

The previous prime is 54665629. The next prime is 54665707. The reversal of 54665647 is 74656645.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54665647 - 2⁷ = 54665519 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 (54665627) 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, 30072 + ... + 31837.

It is an arithmetic number, because the mean of its divisors is an integer number (13682110).

Almost surely, 2^54665647 is an apocalyptic number.

54665647 is a deficient number, since it is larger than the sum of its proper divisors (62793).

54665647 is an equidigital number, since it uses as much as digits as its factorization.

54665647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62792.

The product of its digits is 604800, while the sum is 43.

The square root of 54665647 is about 7393.6220487661. The cubic root of 54665647 is about 379.5230558314.

It can be divided in two parts, 54665 and 647, that multiplied together give a triangular number (35368255 = T₈₄₁₀).

The spelling of 54665647 in words is "fifty-four million, six hundred sixty-five thousand, six hundred forty-seven".